56710659581 has 2 divisors, whose sum is σ = 56710659582. Its totient is φ = 56710659580.

The previous prime is 56710659553. The next prime is 56710659617. The reversal of 56710659581 is 18595601765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51597122500 + 5113537081 = 227150^2 + 71509^2 .

It is a cyclic number.

It is not a de Polignac number, because 56710659581 - 2¹⁸ = 56710397437 is a prime.

It is a super-2 number, since 2×56710659581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56710659281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28355329790 + 28355329791.

It is an arithmetic number, because the mean of its divisors is an integer number (28355329791).

Almost surely, 2^56710659581 is an apocalyptic number.

It is an amenable number.

56710659581 is a deficient number, since it is larger than the sum of its proper divisors (1).

56710659581 is an equidigital number, since it uses as much as digits as its factorization.

56710659581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268000, while the sum is 53.

The spelling of 56710659581 in words is "fifty-six billion, seven hundred ten million, six hundred fifty-nine thousand, five hundred eighty-one".