12644245424 has 20 divisors (see below), whose sum is σ = 24550698744. Its totient is φ = 6308581248.

The previous prime is 12644245421. The next prime is 12644245429. The reversal of 12644245424 is 42454244621.

It is not an unprimeable number, because it can be changed into a prime (12644245421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838637 + ... + 853580.

Almost surely, 2^12644245424 is an apocalyptic number.

It is an amenable number.

12644245424 is a deficient number, since it is larger than the sum of its proper divisors (11906453320).

12644245424 is a wasteful number, since it uses less digits than its factorization.

12644245424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692692 (or 1692686 counting only the distinct ones).

The product of its digits is 245760, while the sum is 38.

The spelling of 12644245424 in words is "twelve billion, six hundred forty-four million, two hundred forty-five thousand, four hundred twenty-four".