Who is on the 10000000000000000 dollar bill?

The $10 trillion bill, which is often cited humorously in discussions about hyperinflation, features a portrait of the 26th President of the United States, William Howard Taft. However, it's important to note that the U.S. does not actually issue a $10 trillion bill; the largest denomination ever printed was the $100,000 bill, featuring Woodrow Wilson. The concept of a $10 quadrillion or $10^16 bill is purely fictional and not part of any official currency.