56631866688 has 140 divisors (see below), whose sum is σ = 170000818240. Its totient is φ = 18638201088.

The previous prime is 56631866653. The next prime is 56631866689. The reversal of 56631866688 is 88666813665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56631866689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 340395 + ... + 478677.

Almost surely, 2^56631866688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56631866688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85000409120).

56631866688 is an abundant number, since it is smaller than the sum of its proper divisors (113368951552).

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

56631866688 is a wasteful number, since it uses less digits than its factorization.

56631866688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138386 (or 138367 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 63.

The spelling of 56631866688 in words is "fifty-six billion, six hundred thirty-one million, eight hundred sixty-six thousand, six hundred eighty-eight".