12657867025 has 12 divisors (see below), whose sum is σ = 15872114700. Its totient is φ = 10012513280.

The previous prime is 12657867023. The next prime is 12657867073. The reversal of 12657867025 is 52076875621.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5159692561 + 7498174464 = 71831^2 + 86592^2 .

It is not a de Polignac number, because 12657867025 - 2¹ = 12657867023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12657867025.

It is not an unprimeable number, because it can be changed into a prime (12657867023) 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 11 ways as a sum of consecutive naturals, for example, 2842240 + ... + 2846689.

It is an arithmetic number, because the mean of its divisors is an integer number (1322676225).

Almost surely, 2^12657867025 is an apocalyptic number.

It is an amenable number.

12657867025 is a deficient number, since it is larger than the sum of its proper divisors (3214247675).

12657867025 is an equidigital number, since it uses as much as digits as its factorization.

12657867025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5689028 (or 5689023 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 12657867025 in words is "twelve billion, six hundred fifty-seven million, eight hundred sixty-seven thousand, twenty-five".