79855992864 has 72 divisors (see below), whose sum is σ = 227367084672. Its totient is φ = 26586241920.

The previous prime is 79855992851. The next prime is 79855992877. The reversal of 79855992864 is 46829955897.

79855992864 is a `hidden beast` number, since 7 + 9 + 8 + 5 + 599 + 28 + 6 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (79855992851) and next prime (79855992877).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 79855992792 and 79855992801.

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, 68569 + ... + 405479.

It is an arithmetic number, because the mean of its divisors is an integer number (3157876176).

Almost surely, 2^79855992864 is an apocalyptic number.

It is an amenable number.

79855992864 is an abundant number, since it is smaller than the sum of its proper divisors (147511091808).

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

79855992864 is a wasteful number, since it uses less digits than its factorization.

79855992864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337750 (or 337739 counting only the distinct ones).

The product of its digits is 391910400, while the sum is 72.

The spelling of 79855992864 in words is "seventy-nine billion, eight hundred fifty-five million, nine hundred ninety-two thousand, eight hundred sixty-four".