56537577 has 6 divisors (see below), whose sum is σ = 81665402. Its totient is φ = 37691712.

The previous prime is 56537549. The next prime is 56537599. The reversal of 56537577 is 77573565.

56537577 is a `hidden beast` number, since 565 + 37 + 57 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55711296 + 826281 = 7464^2 + 909^2 .

It is not a de Polignac number, because 56537577 - 2⁷ = 56537449 is a prime.

It is a super-2 number, since 2×56537577² = 6392995226061858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56537777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3140968 + ... + 3140985.

Almost surely, 2^56537577 is an apocalyptic number.

It is an amenable number.

56537577 is a deficient number, since it is larger than the sum of its proper divisors (25127825).

56537577 is a wasteful number, since it uses less digits than its factorization.

56537577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6281959 (or 6281956 counting only the distinct ones).

The product of its digits is 771750, while the sum is 45.

The square root of 56537577 is about 7519.1473585773. The cubic root of 56537577 is about 383.8065635446.

The spelling of 56537577 in words is "fifty-six million, five hundred thirty-seven thousand, five hundred seventy-seven".