56565657 has 24 divisors (see below), whose sum is σ = 83229120. Its totient is φ = 37015200.

The previous prime is 56565617. The next prime is 56565667. The reversal of 56565657 is 75656565.

It is not a de Polignac number, because 56565657 - 2⁷ = 56565529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56565617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145219 + ... + 145607.

It is an arithmetic number, because the mean of its divisors is an integer number (3467880).

Almost surely, 2^56565657 is an apocalyptic number.

It is an amenable number.

56565657 is a deficient number, since it is larger than the sum of its proper divisors (26663463).

56565657 is a wasteful number, since it uses less digits than its factorization.

56565657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 650 counting only the distinct ones).

The product of its digits is 945000, while the sum is 45.

The square root of 56565657 is about 7521.0143597789. The cubic root of 56565657 is about 383.8700935904.

The spelling of 56565657 in words is "fifty-six million, five hundred sixty-five thousand, six hundred fifty-seven".