12557187047938 has 32 divisors (see below), whose sum is σ = 20880713943936. Its totient is φ = 5626945473408.

The previous prime is 12557187047929. The next prime is 12557187047939. The reversal of 12557187047938 is 83974078175521.

It is a super-2 number, since 2×12557187047938² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 15 ways as a sum of consecutive naturals, for example, 33441531 + ... + 33814942.

It is an arithmetic number, because the mean of its divisors is an integer number (652522310748).

Almost surely, 2^{12557187047938} is an apocalyptic number.

12557187047938 is a deficient number, since it is larger than the sum of its proper divisors (8323526895998).

12557187047938 is a wasteful number, since it uses less digits than its factorization.

12557187047938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67256698.

The product of its (nonzero) digits is 118540800, while the sum is 67.

The spelling of 12557187047938 in words is "twelve trillion, five hundred fifty-seven billion, one hundred eighty-seven million, forty-seven thousand, nine hundred thirty-eight".