56757591 has 30 divisors (see below), whose sum is σ = 93210656. Its totient is φ = 34392600.

The previous prime is 56757557. The next prime is 56757601. The reversal of 56757591 is 19575765.

It is a happy number.

56757591 is a `hidden beast` number, since 5 + 6 + 7 + 57 + 591 = 666.

56757591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56757591 - 2¹⁷ = 56626519 is a prime.

It is a super-2 number, since 2×56757591² = 6442848272246562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56757551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 6906 + ... + 12696.

Almost surely, 2^56757591 is an apocalyptic number.

56757591 is a deficient number, since it is larger than the sum of its proper divisors (36453065).

56757591 is a wasteful number, since it uses less digits than its factorization.

56757591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825 (or 5805 counting only the distinct ones).

The product of its digits is 330750, while the sum is 45.

The square root of 56757591 is about 7533.7634021782. The cubic root of 56757591 is about 384.3037757382.

The spelling of 56757591 in words is "fifty-six million, seven hundred fifty-seven thousand, five hundred ninety-one".