As of 2016, there are 540 billionaires in the US (out of 1,810 in the world).
Here are the top 50, according to Business Insider:
a lot, kiddo!
More than you can imagine!
There are very few billionaires, for example Oprah Winfrey. There are many millionaires, especially celebrities for example Kristen Stewart.
in the world there are about a billion, billionaires, but how many are black or white, is not answered.
There are 53 billionaires in India.
There are no known billionaires located in Michigan.
The Accidental Billionaires has 260 pages.
I don't know how many millionaires, but there are 0 billionaires in Malta.