12557187047931 has 32 divisors (see below), whose sum is σ = 17747197977600. Its totient is φ = 7870399779840.

The previous prime is 12557187047929. The next prime is 12557187047939. The reversal of 12557187047931 is 13974078175521.

It is not a de Polignac number, because 12557187047931 - 2¹ = 12557187047929 is a prime.

It is a super-2 number, since 2×12557187047931² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12557187047939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181325410 + ... + 181394648.

It is an arithmetic number, because the mean of its divisors is an integer number (554599936800).

Almost surely, 2^{12557187047931} is an apocalyptic number.

12557187047931 is a deficient number, since it is larger than the sum of its proper divisors (5190010929669).

12557187047931 is a wasteful number, since it uses less digits than its factorization.

12557187047931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73099.

The product of its (nonzero) digits is 14817600, while the sum is 60.

The spelling of 12557187047931 in words is "twelve trillion, five hundred fifty-seven billion, one hundred eighty-seven million, forty-seven thousand, nine hundred thirty-one".