79640346892 has 24 divisors (see below), whose sum is σ = 142635643920. Its totient is φ = 38895904320.

The previous prime is 79640346883. The next prime is 79640346923. The reversal of 79640346892 is 29864304697.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1037659 + ... + 1111762.

It is an arithmetic number, because the mean of its divisors is an integer number (5943151830).

Almost surely, 2^79640346892 is an apocalyptic number.

It is an amenable number.

79640346892 is a deficient number, since it is larger than the sum of its proper divisors (62995297028).

79640346892 is a wasteful number, since it uses less digits than its factorization.

79640346892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149641 (or 2149639 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 58.

The spelling of 79640346892 in words is "seventy-nine billion, six hundred forty million, three hundred forty-six thousand, eight hundred ninety-two".