63668402631 has 12 divisors (see below), whose sum is σ = 91967850520. Its totient is φ = 42444503280.

The previous prime is 63668402579. The next prime is 63668402663. The reversal of 63668402631 is 13620486636.

63668402631 is a `hidden beast` number, since 6 + 3 + 6 + 6 + 8 + 4 + 0 + 2 + 631 = 666.

It is not a de Polignac number, because 63668402631 - 2²³ = 63660014023 is a prime.

It is a super-3 number, since 3×63668402631³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63668402531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 434865 + ... + 562533.

Almost surely, 2^63668402631 is an apocalyptic number.

63668402631 is a deficient number, since it is larger than the sum of its proper divisors (28299447889).

63668402631 is a wasteful number, since it uses less digits than its factorization.

63668402631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183086 (or 183083 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 63668402631 in words is "sixty-three billion, six hundred sixty-eight million, four hundred two thousand, six hundred thirty-one".