56631604851520 has 112 divisors (see below), whose sum is σ = 135020709170640. Its totient is φ = 22624647839744.

The previous prime is 56631604851469. The next prime is 56631604851593. The reversal of 56631604851520 is 2515840613665.

It can be written as a sum of positive squares in 8 ways, for example, as 3332494062144 + 53299110789376 = 1825512^2 + 7300624^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2627052582 + ... + 2627074138.

Almost surely, 2^{56631604851520} is an apocalyptic number.

It is an amenable number.

56631604851520 is an abundant number, since it is smaller than the sum of its proper divisors (78389104319120).

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

56631604851520 is a wasteful number, since it uses less digits than its factorization.

56631604851520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31340 (or 31330 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 56631604851520 in words is "fifty-six trillion, six hundred thirty-one billion, six hundred four million, eight hundred fifty-one thousand, five hundred twenty".