56980056521 has 2 divisors, whose sum is σ = 56980056522. Its totient is φ = 56980056520.

The previous prime is 56980056491. The next prime is 56980056559. The reversal of 56980056521 is 12565008965.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49880308921 + 7099747600 = 223339^2 + 84260^2 .

It is a cyclic number.

It is not a de Polignac number, because 56980056521 - 2²⁶ = 56912947657 is a prime.

It is a super-2 number, since 2×56980056521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56980056121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28490028260 + 28490028261.

It is an arithmetic number, because the mean of its divisors is an integer number (28490028261).

Almost surely, 2^56980056521 is an apocalyptic number.

It is an amenable number.

56980056521 is a deficient number, since it is larger than the sum of its proper divisors (1).

56980056521 is an equidigital number, since it uses as much as digits as its factorization.

56980056521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 56980056521 in words is "fifty-six billion, nine hundred eighty million, fifty-six thousand, five hundred twenty-one".