631611868 has 12 divisors (see below), whose sum is σ = 1106443072. Its totient is φ = 315485280.

The previous prime is 631611859. The next prime is 631611899. The reversal of 631611868 is 868116136.

631611868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 631611868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75705 + ... + 83632.

Almost surely, 2^631611868 is an apocalyptic number.

It is an amenable number.

631611868 is a deficient number, since it is larger than the sum of its proper divisors (474831204).

631611868 is a wasteful number, since it uses less digits than its factorization.

631611868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160332 (or 160330 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 631611868 is about 25131.8894633889. The cubic root of 631611868 is about 857.9923730085.

The spelling of 631611868 in words is "six hundred thirty-one million, six hundred eleven thousand, eight hundred sixty-eight".