638632760524 has 96 divisors (see below), whose sum is σ = 1305589997376. Its totient is φ = 270114324480.

The previous prime is 638632760471. The next prime is 638632760527. The reversal of 638632760524 is 425067236836.

It is not an unprimeable number, because it can be changed into a prime (638632760527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79299682 + ... + 79307734.

It is an arithmetic number, because the mean of its divisors is an integer number (13599895806).

Almost surely, 2^638632760524 is an apocalyptic number.

It is an amenable number.

638632760524 is an abundant number, since it is smaller than the sum of its proper divisors (666957236852).

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

638632760524 is a wasteful number, since it uses less digits than its factorization.

638632760524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9275 (or 9273 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 52.

The spelling of 638632760524 in words is "six hundred thirty-eight billion, six hundred thirty-two million, seven hundred sixty thousand, five hundred twenty-four".