79117126872 has 64 divisors (see below), whose sum is σ = 226601817600. Its totient is φ = 22549605120.

The previous prime is 79117126867. The next prime is 79117126889. The reversal of 79117126872 is 27862171197.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507004 + ... + 644427.

It is an arithmetic number, because the mean of its divisors is an integer number (3540653400).

Almost surely, 2^79117126872 is an apocalyptic number.

It is an amenable number.

79117126872 is an abundant number, since it is smaller than the sum of its proper divisors (147484690728).

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

79117126872 is a wasteful number, since it uses less digits than its factorization.

79117126872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151856 (or 1151852 counting only the distinct ones).

The product of its digits is 592704, while the sum is 51.

The spelling of 79117126872 in words is "seventy-nine billion, one hundred seventeen million, one hundred twenty-six thousand, eight hundred seventy-two".