77931110864 has 40 divisors (see below), whose sum is σ = 166824411840. Its totient is φ = 35078962688.

The previous prime is 77931110863. The next prime is 77931110879. The reversal of 77931110864 is 46801113977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77931110863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6222254 + ... + 6234765.

It is an arithmetic number, because the mean of its divisors is an integer number (4170610296).

Almost surely, 2^77931110864 is an apocalyptic number.

It is an amenable number.

77931110864 is an abundant number, since it is smaller than the sum of its proper divisors (88893300976).

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

77931110864 is a wasteful number, since it uses less digits than its factorization.

77931110864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12457067 (or 12457061 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 77931110864 in words is "seventy-seven billion, nine hundred thirty-one million, one hundred ten thousand, eight hundred sixty-four".