12565254136 has 16 divisors (see below), whose sum is σ = 23565275640. Its totient is φ = 6281180640.

The previous prime is 12565254127. The next prime is 12565254139. The reversal of 12565254136 is 63145256521.

It is a super-2 number, since 2×12565254136² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565254139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143430 + ... + 213781.

Almost surely, 2^12565254136 is an apocalyptic number.

It is an amenable number.

12565254136 is a deficient number, since it is larger than the sum of its proper divisors (11000021504).

12565254136 is a wasteful number, since it uses less digits than its factorization.

12565254136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361614 (or 361610 counting only the distinct ones).

The product of its digits is 216000, while the sum is 40.

The spelling of 12565254136 in words is "twelve billion, five hundred sixty-five million, two hundred fifty-four thousand, one hundred thirty-six".