Is there a US 10000 dollar bill?

Answer 1

Yes. The U.S. printed $10,000 bills from 1863 to 1945, although the last of them were all part of a so-called "series" that were all dated 1934 regardless of the actual printing year.

In 1969 President Richard Nixon declared that banks no longer had to stock or distribute bills larger than $100. The aim was to make it more difficult for organized crime to make illegal cash transactions by forcing the use of many small bills instead of a few large ones.

Within a few years, most high-denomination bills had disappeared from circulation. Technically they're still legal tender, but anything you might find today would almost certainly be worth more than $10,000 to a collector.