12971658687 has 32 divisors (see below), whose sum is σ = 18858840000. Its totient is φ = 7883246592.

The previous prime is 12971658671. The next prime is 12971658697. The reversal of 12971658687 is 78685617921.

It is not a de Polignac number, because 12971658687 - 2⁴ = 12971658671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12971658687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12971658697) 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, 1325689 + ... + 1335437.

It is an arithmetic number, because the mean of its divisors is an integer number (589338750).

Almost surely, 2^12971658687 is an apocalyptic number.

12971658687 is a deficient number, since it is larger than the sum of its proper divisors (5887181313).

12971658687 is a wasteful number, since it uses less digits than its factorization.

12971658687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10187.

The product of its digits is 10160640, while the sum is 60.

The spelling of 12971658687 in words is "twelve billion, nine hundred seventy-one million, six hundred fifty-eight thousand, six hundred eighty-seven".