631564872 has 32 divisors (see below), whose sum is σ = 1588049280. Its totient is φ = 209303360.

The previous prime is 631564859. The next prime is 631564933. The reversal of 631564872 is 278465136.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71904 + ... + 80207.

It is an arithmetic number, because the mean of its divisors is an integer number (49626540).

Almost surely, 2^631564872 is an apocalyptic number.

It is an amenable number.

631564872 is an abundant number, since it is smaller than the sum of its proper divisors (956484408).

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

631564872 is a wasteful number, since it uses less digits than its factorization.

631564872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152293 (or 152289 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 631564872 is about 25130.9544585955. The cubic root of 631564872 is about 857.9710924237.

The spelling of 631564872 in words is "six hundred thirty-one million, five hundred sixty-four thousand, eight hundred seventy-two".