12717569257 has 2 divisors, whose sum is σ = 12717569258. Its totient is φ = 12717569256.

The previous prime is 12717569251. The next prime is 12717569299. The reversal of 12717569257 is 75296571721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9817639056 + 2899930201 = 99084^2 + 53851^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12717569257 is a prime.

It is not a weakly prime, because it can be changed into another prime (12717569251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6358784628 + 6358784629.

It is an arithmetic number, because the mean of its divisors is an integer number (6358784629).

Almost surely, 2^12717569257 is an apocalyptic number.

It is an amenable number.

12717569257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12717569257 is an equidigital number, since it uses as much as digits as its factorization.

12717569257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1852200, while the sum is 52.

The spelling of 12717569257 in words is "twelve billion, seven hundred seventeen million, five hundred sixty-nine thousand, two hundred fifty-seven".