56565656531 has 2 divisors, whose sum is σ = 56565656532. Its totient is φ = 56565656530.

The previous prime is 56565656527. The next prime is 56565656591. The reversal of 56565656531 is 13565656565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56565656531 - 2² = 56565656527 is a prime.

It is a super-2 number, since 2×56565656531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56565656591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28282828265 + 28282828266.

It is an arithmetic number, because the mean of its divisors is an integer number (28282828266).

Almost surely, 2^56565656531 is an apocalyptic number.

56565656531 is a deficient number, since it is larger than the sum of its proper divisors (1).

56565656531 is an equidigital number, since it uses as much as digits as its factorization.

56565656531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150000, while the sum is 53.

The spelling of 56565656531 in words is "fifty-six billion, five hundred sixty-five million, six hundred fifty-six thousand, five hundred thirty-one".