18608560717 has 2 divisors, whose sum is σ = 18608560718. Its totient is φ = 18608560716.

The previous prime is 18608560661. The next prime is 18608560721. The reversal of 18608560717 is 71706580681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15573542436 + 3035018281 = 124794^2 + 55091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18608560717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18608560787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9304280358 + 9304280359.

It is an arithmetic number, because the mean of its divisors is an integer number (9304280359).

Almost surely, 2^18608560717 is an apocalyptic number.

It is an amenable number.

18608560717 is a deficient number, since it is larger than the sum of its proper divisors (1).

18608560717 is an equidigital number, since it uses as much as digits as its factorization.

18608560717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 18608560717 in words is "eighteen billion, six hundred eight million, five hundred sixty thousand, seven hundred seventeen".