12557125825679 has 4 divisors (see below), whose sum is σ = 12566352223680. Its totient is φ = 12547899427680.

The previous prime is 12557125825631. The next prime is 12557125825703. The reversal of 12557125825679 is 97652852175521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12557125825679 - 2²⁰ = 12557124777103 is a prime.

It is a super-2 number, since 2×12557125825679² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12557125827679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4613196959 + ... + 4613199680.

It is an arithmetic number, because the mean of its divisors is an integer number (3141588055920).

Almost surely, 2^{12557125825679} is an apocalyptic number.

12557125825679 is a deficient number, since it is larger than the sum of its proper divisors (9226398001).

12557125825679 is an equidigital number, since it uses as much as digits as its factorization.

12557125825679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9226398000.

The product of its digits is 105840000, while the sum is 65.

The spelling of 12557125825679 in words is "twelve trillion, five hundred fifty-seven billion, one hundred twenty-five million, eight hundred twenty-five thousand, six hundred seventy-nine".