79999902986 has 16 divisors (see below), whose sum is σ = 124610616648. Its totient is φ = 38489760000.

The previous prime is 79999902979. The next prime is 79999902989. The reversal of 79999902986 is 68920999997.

It can be written as a sum of positive squares in 4 ways, for example, as 74375652961 + 5624250025 = 272719^2 + 74995^2 .

It is not an unprimeable number, because it can be changed into a prime (79999902989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6676265 + ... + 6688236.

Almost surely, 2^79999902986 is an apocalyptic number.

79999902986 is a deficient number, since it is larger than the sum of its proper divisors (44610713662).

79999902986 is a wasteful number, since it uses less digits than its factorization.

79999902986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13364617.

The product of its (nonzero) digits is 357128352, while the sum is 77.

The spelling of 79999902986 in words is "seventy-nine billion, nine hundred ninety-nine million, nine hundred two thousand, nine hundred eighty-six".