12817595257 has 8 divisors (see below), whose sum is σ = 12869244360. Its totient is φ = 12765976320.

The previous prime is 12817595251. The next prime is 12817595261. The reversal of 12817595257 is 75259571821.

It can be written as a sum of positive squares in 4 ways, for example, as 304711936 + 12512883321 = 17456^2 + 111861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12817595257 - 2³ = 12817595249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12817595251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1264903 + ... + 1274995.

It is an arithmetic number, because the mean of its divisors is an integer number (1608655545).

Almost surely, 2^12817595257 is an apocalyptic number.

It is an amenable number.

12817595257 is a deficient number, since it is larger than the sum of its proper divisors (51649103).

12817595257 is a wasteful number, since it uses less digits than its factorization.

12817595257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15083.

The product of its digits is 1764000, while the sum is 52.

The spelling of 12817595257 in words is "twelve billion, eight hundred seventeen million, five hundred ninety-five thousand, two hundred fifty-seven".