77312655504 has 120 divisors (see below), whose sum is σ = 252324425600. Its totient is φ = 22089316032.

The previous prime is 77312655503. The next prime is 77312655523. The reversal of 77312655504 is 40555621377.

It is a happy number.

77312655504 is a `hidden beast` number, since 7 + 7 + 31 + 2 + 65 + 550 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 77312655504.

It is not an unprimeable number, because it can be changed into a prime (77312655503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 733252 + ... + 832035.

Almost surely, 2^77312655504 is an apocalyptic number.

It is an amenable number.

77312655504 is an abundant number, since it is smaller than the sum of its proper divisors (175011770096).

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

77312655504 is a wasteful number, since it uses less digits than its factorization.

77312655504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565322 (or 1565299 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 45.

The spelling of 77312655504 in words is "seventy-seven billion, three hundred twelve million, six hundred fifty-five thousand, five hundred four".