12507516171 has 12 divisors (see below), whose sum is σ = 18068188320. Its totient is φ = 8337524400.

The previous prime is 12507516157. The next prime is 12507516187. The reversal of 12507516171 is 17161570521.

It is a happy number.

12507516171 is a `hidden beast` number, since 125 + 0 + 7 + 516 + 17 + 1 = 666.

It is not a de Polignac number, because 12507516171 - 2⁵ = 12507516139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12507515171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36846 + ... + 162396.

It is an arithmetic number, because the mean of its divisors is an integer number (1505682360).

Almost surely, 2^12507516171 is an apocalyptic number.

12507516171 is a deficient number, since it is larger than the sum of its proper divisors (5560672149).

12507516171 is a wasteful number, since it uses less digits than its factorization.

12507516171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136626 (or 136623 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 36.

It can be divided in two parts, 125075 and 16171, that added together give a triangular number (141246 = T₅₃₁).

The spelling of 12507516171 in words is "twelve billion, five hundred seven million, five hundred sixteen thousand, one hundred seventy-one".