79964613531 has 20 divisors (see below), whose sum is σ = 130312704984. Its totient is φ = 48463401600.

The previous prime is 79964613517. The next prime is 79964613623. The reversal of 79964613531 is 13531646997.

79964613531 is a `hidden beast` number, since 7 + 9 + 96 + 4 + 6 + 13 + 531 = 666.

It is not a de Polignac number, because 79964613531 - 2⁵ = 79964613499 is a prime.

It is a super-2 number, since 2×79964613531² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (79964613031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44872630 + ... + 44874411.

Almost surely, 2^79964613531 is an apocalyptic number.

79964613531 is a deficient number, since it is larger than the sum of its proper divisors (50348091453).

79964613531 is a wasteful number, since it uses less digits than its factorization.

79964613531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89747064 (or 89747055 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The spelling of 79964613531 in words is "seventy-nine billion, nine hundred sixty-four million, six hundred thirteen thousand, five hundred thirty-one".