12644215262512 has 10 divisors (see below), whose sum is σ = 24498167071148. Its totient is φ = 6322107631248.

The previous prime is 12644215262411. The next prime is 12644215262521. The reversal of 12644215262512 is 21526251244621.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395131726938 + ... + 395131726969.

Almost surely, 2^{12644215262512} is an apocalyptic number.

It is an amenable number.

12644215262512 is a deficient number, since it is larger than the sum of its proper divisors (11853951808636).

12644215262512 is an equidigital number, since it uses as much as digits as its factorization.

12644215262512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790263453915 (or 790263453909 counting only the distinct ones).

The product of its digits is 460800, while the sum is 43.

The spelling of 12644215262512 in words is "twelve trillion, six hundred forty-four billion, two hundred fifteen million, two hundred sixty-two thousand, five hundred twelve".