12642156597 has 16 divisors (see below), whose sum is σ = 20278146560. Its totient is φ = 6843874032.

The previous prime is 12642156587. The next prime is 12642156629. The reversal of 12642156597 is 79565124621.

It is not a de Polignac number, because 12642156597 - 2¹⁰ = 12642155573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642156547) 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, 15841903 + ... + 15842700.

It is an arithmetic number, because the mean of its divisors is an integer number (1267384160).

Almost surely, 2^12642156597 is an apocalyptic number.

It is an amenable number.

12642156597 is a deficient number, since it is larger than the sum of its proper divisors (7635989963).

12642156597 is a wasteful number, since it uses less digits than its factorization.

12642156597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31684632.

The product of its digits is 907200, while the sum is 48.

The spelling of 12642156597 in words is "twelve billion, six hundred forty-two million, one hundred fifty-six thousand, five hundred ninety-seven".