79999695972 has 36 divisors (see below), whose sum is σ = 231110233536. Its totient is φ = 22857055920.

The previous prime is 79999695967. The next prime is 79999696043. The reversal of 79999695972 is 27959699997.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×79999695972² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79999695891 and 79999695900.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158729304 + ... + 158729807.

Almost surely, 2^79999695972 is an apocalyptic number.

It is an amenable number.

79999695972 is an abundant number, since it is smaller than the sum of its proper divisors (151110537564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79999695972 is a wasteful number, since it uses less digits than its factorization.

79999695972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317459128 (or 317459123 counting only the distinct ones).

The product of its digits is 1562436540, while the sum is 81.

The spelling of 79999695972 in words is "seventy-nine billion, nine hundred ninety-nine million, six hundred ninety-five thousand, nine hundred seventy-two".