56556605151531 has 12 divisors (see below), whose sum is σ = 81777006843480. Its totient is φ = 37665572940960.

The previous prime is 56556605151523. The next prime is 56556605151533. The reversal of 56556605151531 is 13515150665565.

56556605151531 is a `hidden beast` number, since 5 + 6 + 5 + 5 + 6 + 6 + 0 + 51 + 51 + 531 = 666.

It is not a de Polignac number, because 56556605151531 - 2³ = 56556605151523 is a prime.

It is a super-2 number, since 2×56556605151531² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56556605151533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3235865226 + ... + 3235882703.

It is an arithmetic number, because the mean of its divisors is an integer number (6814750570290).

Almost surely, 2^{56556605151531} is an apocalyptic number.

56556605151531 is a deficient number, since it is larger than the sum of its proper divisors (25220401691949).

56556605151531 is a wasteful number, since it uses less digits than its factorization.

56556605151531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6471748906 (or 6471748903 counting only the distinct ones).

The product of its (nonzero) digits is 10125000, while the sum is 54.

The spelling of 56556605151531 in words is "fifty-six trillion, five hundred fifty-six billion, six hundred five million, one hundred fifty-one thousand, five hundred thirty-one".