12565588416 has 28 divisors (see below), whose sum is σ = 33246453192. Its totient is φ = 4188529408.

The previous prime is 12565588381. The next prime is 12565588417. The reversal of 12565588416 is 61488556521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565588417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32722695 + ... + 32723078.

Almost surely, 2^12565588416 is an apocalyptic number.

12565588416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12565588416 is an abundant number, since it is smaller than the sum of its proper divisors (20680864776).

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

12565588416 is an equidigital number, since it uses as much as digits as its factorization.

12565588416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65445788 (or 65445778 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 51.

The spelling of 12565588416 in words is "twelve billion, five hundred sixty-five million, five hundred eighty-eight thousand, four hundred sixteen".