56566171613717 has 2 divisors, whose sum is σ = 56566171613718. Its totient is φ = 56566171613716.

The previous prime is 56566171613713. The next prime is 56566171613729. The reversal of 56566171613717 is 71731617166565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39226559398321 + 17339612215396 = 6263111^2 + 4164086^2 .

It is a cyclic number.

It is not a de Polignac number, because 56566171613717 - 2² = 56566171613713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56566171613717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56566171613713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28283085806858 + 28283085806859.

It is an arithmetic number, because the mean of its divisors is an integer number (28283085806859).

Almost surely, 2^{56566171613717} is an apocalyptic number.

It is an amenable number.

56566171613717 is a deficient number, since it is larger than the sum of its proper divisors (1).

56566171613717 is an equidigital number, since it uses as much as digits as its factorization.

56566171613717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33339600, while the sum is 62.

The spelling of 56566171613717 in words is "fifty-six trillion, five hundred sixty-six billion, one hundred seventy-one million, six hundred thirteen thousand, seven hundred seventeen".