5656605077521 has 2 divisors, whose sum is σ = 5656605077522. Its totient is φ = 5656605077520.

The previous prime is 5656605077447. The next prime is 5656605077527. The reversal of 5656605077521 is 1257705066565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5367307395025 + 289297682496 = 2316745^2 + 537864^2 .

It is a cyclic number.

It is not a de Polignac number, because 5656605077521 - 2²³ = 5656596688913 is a prime.

It is not a weakly prime, because it can be changed into another prime (5656605077527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828302538760 + 2828302538761.

It is an arithmetic number, because the mean of its divisors is an integer number (2828302538761).

Almost surely, 2^{5656605077521} is an apocalyptic number.

It is an amenable number.

5656605077521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5656605077521 is an equidigital number, since it uses as much as digits as its factorization.

5656605077521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230000, while the sum is 55.

The spelling of 5656605077521 in words is "five trillion, six hundred fifty-six billion, six hundred five million, seventy-seven thousand, five hundred twenty-one".