12557861057 has 16 divisors (see below), whose sum is σ = 15029183232. Its totient is φ = 10259208960.

The previous prime is 12557861047. The next prime is 12557861059. The reversal of 12557861057 is 75016875521.

It is not a de Polignac number, because 12557861057 - 2⁸ = 12557860801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12557861059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93548 + ... + 184029.

It is an arithmetic number, because the mean of its divisors is an integer number (939323952).

Almost surely, 2^12557861057 is an apocalyptic number.

It is an amenable number.

12557861057 is a deficient number, since it is larger than the sum of its proper divisors (2471322175).

12557861057 is a wasteful number, since it uses less digits than its factorization.

12557861057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277888.

The product of its (nonzero) digits is 588000, while the sum is 47.

The spelling of 12557861057 in words is "twelve billion, five hundred fifty-seven million, eight hundred sixty-one thousand, fifty-seven".