President Donald Trump embarks on a visit to Saudi Arabia on Tuesday with a $1 trillion wish list for investments in the United States — a sum equivalent to the kingdom’s entire gross domestic product last year.

The Saudi crown prince is offering $600 billion during Trump’s presidency.

Neither figure is realistic, economists say.

With a laundry list of its own costly megaprojects to build and with oil prices well below the level needed to finance its spending, Saudi Arabia is facing a budget deficit that could balloon to more than $70 billion this year. It is increasingly borrowing money rather than lending it.

But that did not stop Crown Prince Mohammed bin Salman, the de facto leader of the authoritarian Saudi monarchy, from pledging in January to invest $600 billion in the United States while Trump is in office. Not long after that, Trump called him a “fantastic guy.”

Then Trump said he would ask the crown prince to round that figure up to $1 trillion. And bring down the price of oil — the source of the kingdom’s vast wealth — to boot.

“We’ve been very good to them,” Trump said.

Economists said Saudi investments in the United States would probably increase during Trump’s administration but were unlikely to even approach $1 trillion.

The figure that Trump is seeking exceeds the value of all assets in the kingdom’s hefty sovereign wealth fund, which is worth about $925 billion and largely tied up in domestic holdings.

“I don’t see how they get anywhere close to $600 billion, let alone $1 trillion,” said Tim Callen, an economist and former International Monetary Fund mission chief to Saudi Arabia.

In fact, at the crown prince’s flagship investment forum in October, Yasir al-Rumayyan, head of the Saudi sovereign wealth fund, said he was aiming to decrease the percentage of the fund’s assets that were invested abroad.

“We’re more focused on the domestic economy,” he said, calling this a “big paradigm shift.”

But for Trump and Crown Prince Mohammed, these finer details are not necessarily the point. They speak the same language, Callen said, describing them as “two guys who like throwing very large numbers around.”

Trump has cultivated strong business ties with Saudi Arabia. During his first term, his son-in-law and adviser Jared Kushner developed a close relationship with Crown Prince Mohammed, and the two shared a transactional mindset.

Trump and the crown prince both have a penchant for eye-popping declarations, leaving questions about feasibility for their underlings to sort out.

In some cases, Crown Prince Mohammed’s grand pronouncements have come to fruition. He has rapidly loosened social restrictions in the once-ultraconservative kingdom, enabling women to pour into the labor force and teenagers to dance at raves in the desert. Other plans, such as a $200 billion solar energy project that would have been the largest in the world, have been quietly swept aside.

Trump has claimed that, during his 2017 Saudi visit, he secured $450 billion of investments in the United States. But Callen said he analyzed public data and determined that this amount did not fully materialize.

The export of American goods and services to Saudi Arabia while Trump was in office from 2017-20 totaled $92 billion, Callen found, less than the total during President Barack Obama’s second term, which ended in 2017.

Asked about this discrepancy and about Trump’s target of securing $1 trillion in investments on the coming visit, the White House communications director Steven Cheung said the president “has already successfully secured more than $5 trillion in new investments into the U.S. economy — bringing manufacturing, boosting production and creating high-paying jobs.”

Trump has said it was the prospect of hundreds of billions of dollars in investments that prompted him to prioritize Saudi Arabia to kick off his first major overseas tour of this term — as he did in 2017 during his first term.

After Saudi Arabia, Trump will visit two other wealthy Persian Gulf allies on this trip, Qatar and the United Arab Emirates.