12644903722 has 16 divisors (see below), whose sum is σ = 21908817792. Its totient is φ = 5409584320.

The previous prime is 12644903701. The next prime is 12644903753. The reversal of 12644903722 is 22730944621.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16904578 + ... + 16905325.

It is an arithmetic number, because the mean of its divisors is an integer number (1369301112).

Almost surely, 2^12644903722 is an apocalyptic number.

12644903722 is a deficient number, since it is larger than the sum of its proper divisors (9263914070).

12644903722 is a wasteful number, since it uses less digits than its factorization.

12644903722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33809933.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 12644903722 in words is "twelve billion, six hundred forty-four million, nine hundred three thousand, seven hundred twenty-two".