79854786972 has 36 divisors (see below), whose sum is σ = 203021964600. Its totient is φ = 26464397472.

The previous prime is 79854786931. The next prime is 79854786983. The reversal of 79854786972 is 27968745897.

79854786972 is a `hidden beast` number, since 7 + 9 + 8 + 547 + 8 + 6 + 9 + 72 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 79854786972.

It is a congruent number.

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, 6404722 + ... + 6417177.

Almost surely, 2^79854786972 is an apocalyptic number.

It is an amenable number.

79854786972 is an abundant number, since it is smaller than the sum of its proper divisors (123167177628).

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

79854786972 is a wasteful number, since it uses less digits than its factorization.

79854786972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12822082 (or 12822077 counting only the distinct ones).

The product of its digits is 426746880, while the sum is 72.

The spelling of 79854786972 in words is "seventy-nine billion, eight hundred fifty-four million, seven hundred eighty-six thousand, nine hundred seventy-two".