12644238616 has 16 divisors (see below), whose sum is σ = 23776275240. Its totient is φ = 6303898560.

The previous prime is 12644238589. The next prime is 12644238637. The reversal of 12644238616 is 61683244621.

12644238616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2274645 + ... + 2280196.

Almost surely, 2^12644238616 is an apocalyptic number.

It is an amenable number.

12644238616 is a deficient number, since it is larger than the sum of its proper divisors (11132036624).

12644238616 is a wasteful number, since it uses less digits than its factorization.

12644238616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4555194 (or 4555190 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The spelling of 12644238616 in words is "twelve billion, six hundred forty-four million, two hundred thirty-eight thousand, six hundred sixteen".