12615264634465 has 4 divisors (see below), whose sum is σ = 15138317561364. Its totient is φ = 10092211707568.

The previous prime is 12615264634447. The next prime is 12615264634487. The reversal of 12615264634465 is 56443646251621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9166161939489 + 3449102694976 = 3027567^2 + 1857176^2 .

It is a cyclic number.

It is not a de Polignac number, because 12615264634465 - 2¹⁹ = 12615264110177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1261526463442 + ... + 1261526463451.

It is an arithmetic number, because the mean of its divisors is an integer number (3784579390341).

Almost surely, 2^{12615264634465} is an apocalyptic number.

It is an amenable number.

12615264634465 is a deficient number, since it is larger than the sum of its proper divisors (2523052926899).

12615264634465 is an equidigital number, since it uses as much as digits as its factorization.

12615264634465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523052926898.

The product of its digits is 24883200, while the sum is 55.

The spelling of 12615264634465 in words is "twelve trillion, six hundred fifteen billion, two hundred sixty-four million, six hundred thirty-four thousand, four hundred sixty-five".