Numeric Value: 80

The folowing table expresses '80' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.

BaseDR7DR6DR5DR4DR3DR2DR1
21010000    101
3   2222 22,112
4   1100  2
5    310 4
6    212 5
7    143112
8    120 3
9     88,178
10     808
11     73A
12     68,123
13     628
14     5A,112
15     55A
16     505

Math World

Factors: 24 * 5

80 is in the Pythagorean Triples: (80, 1599, 1601), (39, 80, 89).

A 'Octacontagon' is a 'regular polygon' with 80 sides.

Physical World

80 is the atomic weight of Mercury (Hg).