12565131437424 has 80 divisors (see below), whose sum is σ = 34408255444992. Its totient is φ = 3937537465344.

The previous prime is 12565131437413. The next prime is 12565131437447. The reversal of 12565131437424 is 42473413156521.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7998864 + ... + 9439919.

Almost surely, 2^{12565131437424} is an apocalyptic number.

It is an amenable number.

12565131437424 is an abundant number, since it is smaller than the sum of its proper divisors (21843124007568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12565131437424 is a wasteful number, since it uses less digits than its factorization.

12565131437424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17439694 (or 17439688 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 48.

The spelling of 12565131437424 in words is "twelve trillion, five hundred sixty-five billion, one hundred thirty-one million, four hundred thirty-seven thousand, four hundred twenty-four".