79789689888 has 24 divisors (see below), whose sum is σ = 209447936208. Its totient is φ = 26596563264.

The previous prime is 79789689871. The next prime is 79789689901. The reversal of 79789689888 is 88898698797.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×79789689888² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415571206 + ... + 415571397.

It is an arithmetic number, because the mean of its divisors is an integer number (8726997342).

Almost surely, 2^79789689888 is an apocalyptic number.

It is an amenable number.

79789689888 is an abundant number, since it is smaller than the sum of its proper divisors (129658246320).

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

79789689888 is a wasteful number, since it uses less digits than its factorization.

79789689888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831142616 (or 831142608 counting only the distinct ones).

The product of its digits is 7023034368, while the sum is 87.

The spelling of 79789689888 in words is "seventy-nine billion, seven hundred eighty-nine million, six hundred eighty-nine thousand, eight hundred eighty-eight".