655638564 has 24 divisors (see below), whose sum is σ = 1748369728. Its totient is φ = 187325280.

The previous prime is 655638559. The next prime is 655638601. The reversal of 655638564 is 465836556.

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, 3902527 + ... + 3902694.

Almost surely, 2^655638564 is an apocalyptic number.

It is an amenable number.

655638564 is an abundant number, since it is smaller than the sum of its proper divisors (1092731164).

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

655638564 is a wasteful number, since it uses less digits than its factorization.

655638564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7805235 (or 7805233 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 48.

The square root of 655638564 is about 25605.4401250984. The cubic root of 655638564 is about 868.7366893808.

The spelling of 655638564 in words is "six hundred fifty-five million, six hundred thirty-eight thousand, five hundred sixty-four".