68633631 has 48 divisors (see below), whose sum is σ = 114031008. Its totient is φ = 39398400.

The previous prime is 68633627. The next prime is 68633639. The reversal of 68633631 is 13633686.

It is not a de Polignac number, because 68633631 - 2² = 68633627 is a prime.

It is a super-2 number, since 2×68633631² = 9421150608488322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68633639) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149955 + ... + 150411.

It is an arithmetic number, because the mean of its divisors is an integer number (2375646).

Almost surely, 2^68633631 is an apocalyptic number.

68633631 is a deficient number, since it is larger than the sum of its proper divisors (45397377).

68633631 is a wasteful number, since it uses less digits than its factorization.

68633631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 549 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 68633631 is about 8284.5416891944. The cubic root of 68633631 is about 409.4293687750.

Subtracting from 68633631 its reverse (13633686), we obtain a palindrome (54999945).

The spelling of 68633631 in words is "sixty-eight million, six hundred thirty-three thousand, six hundred thirty-one".