56455232661 has 40 divisors (see below), whose sum is σ = 86250472704. Its totient is φ = 36783966240.

The previous prime is 56455232621. The next prime is 56455232693. The reversal of 56455232661 is 16623255465.

56455232661 is a `hidden beast` number, since 5 + 6 + 4 + 552 + 32 + 6 + 61 = 666.

It is not a de Polignac number, because 56455232661 - 2¹⁴ = 56455216277 is a prime.

It is a super-2 number, since 2×56455232661² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56455232621) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2780416 + ... + 2800646.

Almost surely, 2^56455232661 is an apocalyptic number.

It is an amenable number.

56455232661 is a deficient number, since it is larger than the sum of its proper divisors (29795240043).

56455232661 is a wasteful number, since it uses less digits than its factorization.

56455232661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21023 (or 21014 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 56455232661 in words is "fifty-six billion, four hundred fifty-five million, two hundred thirty-two thousand, six hundred sixty-one".