12644245422 has 32 divisors (see below), whose sum is σ = 28118835360. Its totient is φ = 4211671680.

The previous prime is 12644245421. The next prime is 12644245429. The reversal of 12644245422 is 22454244621.

12644245422 is a `hidden beast` number, since 1 + 2 + 644 + 2 + 4 + 5 + 4 + 2 + 2 = 666.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10203 + ... + 159350.

It is an arithmetic number, because the mean of its divisors is an integer number (878713605).

Almost surely, 2^12644245422 is an apocalyptic number.

12644245422 is an abundant number, since it is smaller than the sum of its proper divisors (15474589938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12644245422 is a wasteful number, since it uses less digits than its factorization.

12644245422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170945 (or 170939 counting only the distinct ones).

The product of its digits is 122880, while the sum is 36.

The spelling of 12644245422 in words is "twelve billion, six hundred forty-four million, two hundred forty-five thousand, four hundred twenty-two".