12644389374938 has 16 divisors (see below), whose sum is σ = 19620725942880. Its totient is φ = 6104150099376.

The previous prime is 12644389374887. The next prime is 12644389375003. The reversal of 12644389374938 is 83947398344621.

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 7 ways as a sum of consecutive naturals, for example, 10264745 + ... + 11430387.

It is an arithmetic number, because the mean of its divisors is an integer number (1226295371430).

Almost surely, 2^{12644389374938} is an apocalyptic number.

12644389374938 is a deficient number, since it is larger than the sum of its proper divisors (6976336567942).

12644389374938 is a wasteful number, since it uses less digits than its factorization.

12644389374938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352701.

The product of its digits is 752467968, while the sum is 71.

The spelling of 12644389374938 in words is "twelve trillion, six hundred forty-four billion, three hundred eighty-nine million, three hundred seventy-four thousand, nine hundred thirty-eight".