77712540928 has 72 divisors (see below), whose sum is σ = 173797313760. Its totient is φ = 34369136640.

The previous prime is 77712540911. The next prime is 77712540937. The reversal of 77712540928 is 82904521777.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 268738 + ... + 477121.

It is an arithmetic number, because the mean of its divisors is an integer number (2413851580).

Almost surely, 2^77712540928 is an apocalyptic number.

It is an amenable number.

77712540928 is an abundant number, since it is smaller than the sum of its proper divisors (96084772832).

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

77712540928 is a wasteful number, since it uses less digits than its factorization.

77712540928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745923 (or 745909 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 77712540928 in words is "seventy-seven billion, seven hundred twelve million, five hundred forty thousand, nine hundred twenty-eight".