12565258815 has 16 divisors (see below), whose sum is σ = 20483743968. Its totient is φ = 6575028096.

The previous prime is 12565258813. The next prime is 12565258829. The reversal of 12565258815 is 51885256521.

It is not a de Polignac number, because 12565258815 - 2¹ = 12565258813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565258813) 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, 7901884 + ... + 7903473.

It is an arithmetic number, because the mean of its divisors is an integer number (1280233998).

Almost surely, 2^12565258815 is an apocalyptic number.

12565258815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12565258815 is a deficient number, since it is larger than the sum of its proper divisors (7918485153).

12565258815 is a wasteful number, since it uses less digits than its factorization.

12565258815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15805418.

The product of its digits is 960000, while the sum is 48.

The spelling of 12565258815 in words is "twelve billion, five hundred sixty-five million, two hundred fifty-eight thousand, eight hundred fifteen".