77964236792 has 32 divisors (see below), whose sum is σ = 166688247600. Its totient is φ = 33866817024.

The previous prime is 77964236747. The next prime is 77964236797. The reversal of 77964236792 is 29763246977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77964236797) 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, 22046942 + ... + 22050477.

Almost surely, 2^77964236792 is an apocalyptic number.

It is an amenable number.

77964236792 is an abundant number, since it is smaller than the sum of its proper divisors (88724010808).

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

77964236792 is a wasteful number, since it uses less digits than its factorization.

77964236792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44097455 (or 44097451 counting only the distinct ones).

The product of its digits is 48009024, while the sum is 62.

The spelling of 77964236792 in words is "seventy-seven billion, nine hundred sixty-four million, two hundred thirty-six thousand, seven hundred ninety-two".