77964988516 has 24 divisors (see below), whose sum is σ = 137789960000. Its totient is φ = 38596945824.

The previous prime is 77964988501. The next prime is 77964988529. The reversal of 77964988516 is 61588946977.

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, 546055 + ... + 673873.

Almost surely, 2^77964988516 is an apocalyptic number.

It is an amenable number.

77964988516 is a deficient number, since it is larger than the sum of its proper divisors (59824971484).

77964988516 is a wasteful number, since it uses less digits than its factorization.

77964988516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129331 (or 129329 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 70.

The spelling of 77964988516 in words is "seventy-seven billion, nine hundred sixty-four million, nine hundred eighty-eight thousand, five hundred sixteen".