12557825617 has 2 divisors, whose sum is σ = 12557825618. Its totient is φ = 12557825616.

The previous prime is 12557825597. The next prime is 12557825669. The reversal of 12557825617 is 71652875521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10916279361 + 1641546256 = 104481^2 + 40516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12557825617 is a prime.

It is not a weakly prime, because it can be changed into another prime (12557820617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6278912808 + 6278912809.

It is an arithmetic number, because the mean of its divisors is an integer number (6278912809).

Almost surely, 2^12557825617 is an apocalyptic number.

It is an amenable number.

12557825617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12557825617 is an equidigital number, since it uses as much as digits as its factorization.

12557825617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1176000, while the sum is 49.

The spelling of 12557825617 in words is "twelve billion, five hundred fifty-seven million, eight hundred twenty-five thousand, six hundred seventeen".