13656008657 has 2 divisors, whose sum is σ = 13656008658. Its totient is φ = 13656008656.

The previous prime is 13656008633. The next prime is 13656008683. The reversal of 13656008657 is 75680065631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12267999121 + 1388009536 = 110761^2 + 37256^2 .

It is a cyclic number.

It is not a de Polignac number, because 13656008657 - 2¹⁰ = 13656007633 is a prime.

It is not a weakly prime, because it can be changed into another prime (13656008627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6828004328 + 6828004329.

It is an arithmetic number, because the mean of its divisors is an integer number (6828004329).

Almost surely, 2^13656008657 is an apocalyptic number.

It is an amenable number.

13656008657 is a deficient number, since it is larger than the sum of its proper divisors (1).

13656008657 is an equidigital number, since it uses as much as digits as its factorization.

13656008657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 13656008657 in words is "thirteen billion, six hundred fifty-six million, eight thousand, six hundred fifty-seven".