12644645375 has 16 divisors (see below), whose sum is σ = 15970657248. Its totient is φ = 9993832000.

The previous prime is 12644645333. The next prime is 12644645381. The reversal of 12644645375 is 57354644621.

It is not a de Polignac number, because 12644645375 - 2⁶ = 12644645311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 599006 + ... + 619755.

It is an arithmetic number, because the mean of its divisors is an integer number (998166078).

Almost surely, 2^12644645375 is an apocalyptic number.

12644645375 is a deficient number, since it is larger than the sum of its proper divisors (3326011873).

12644645375 is an equidigital number, since it uses as much as digits as its factorization.

12644645375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218859 (or 1218849 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 47.

The spelling of 12644645375 in words is "twelve billion, six hundred forty-four million, six hundred forty-five thousand, three hundred seventy-five".