77513680764 has 36 divisors (see below), whose sum is σ = 211009465576. Its totient is φ = 23850363168.

The previous prime is 77513680753. The next prime is 77513680789. The reversal of 77513680764 is 46708631577.

77513680764 is a `hidden beast` number, since 7 + 7 + 513 + 68 + 0 + 7 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 77513680764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82813294 + ... + 82814229.

Almost surely, 2^77513680764 is an apocalyptic number.

It is an amenable number.

77513680764 is an abundant number, since it is smaller than the sum of its proper divisors (133495784812).

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

77513680764 is a wasteful number, since it uses less digits than its factorization.

77513680764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165627546 (or 165627541 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 54.

The spelling of 77513680764 in words is "seventy-seven billion, five hundred thirteen million, six hundred eighty thousand, seven hundred sixty-four".