76724431656 has 32 divisors (see below), whose sum is σ = 196995164640. Its totient is φ = 24883599168.

The previous prime is 76724431643. The next prime is 76724431661. The reversal of 76724431656 is 65613442767.

It is a junction number, because it is equal to n+sod(n) for n = 76724431599 and 76724431608.

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, 43199806 + ... + 43201581.

It is an arithmetic number, because the mean of its divisors is an integer number (6156098895).

Almost surely, 2^76724431656 is an apocalyptic number.

It is an amenable number.

76724431656 is an abundant number, since it is smaller than the sum of its proper divisors (120270732984).

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

76724431656 is a wasteful number, since it uses less digits than its factorization.

76724431656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86401433 (or 86401429 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 51.

The spelling of 76724431656 in words is "seventy-six billion, seven hundred twenty-four million, four hundred thirty-one thousand, six hundred fifty-six".