56663631 has 20 divisors (see below), whose sum is σ = 85052352. Its totient is φ = 37594368.

The previous prime is 56663597. The next prime is 56663639. The reversal of 56663631 is 13636665.

It is a happy number.

It is not a de Polignac number, because 56663631 - 2²³ = 48275023 is a prime.

It is a super-2 number, since 2×56663631² = 6421534156208322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56663639) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16495 + ... + 19631.

Almost surely, 2^56663631 is an apocalyptic number.

56663631 is a deficient number, since it is larger than the sum of its proper divisors (28388721).

56663631 is a wasteful number, since it uses less digits than its factorization.

56663631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372 (or 3363 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 56663631 is about 7527.5248920213. The cubic root of 56663631 is about 384.0915919212.

The spelling of 56663631 in words is "fifty-six million, six hundred sixty-three thousand, six hundred thirty-one".