The odds against a royal flush in poker are exactly 649,739 to 1

111,111,111 X 111,111,111 = 12,345,678,987,654,321

The largest of the known "perfect" numbers has 12,003 digits.

The number 111,111,111 multiplied by itself will result in the number 12,345,678,987,654,321

Though there are only 52 cards in a typical deck of cards, they can be arranged in just about 80,660,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 different ways.

The number 2,520 can be divided by 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 without having a fractional leftover.