12640044922 has 16 divisors (see below), whose sum is σ = 20031183360. Its totient is φ = 5972257648.

The previous prime is 12640044917. The next prime is 12640044931. The reversal of 12640044922 is 22944004621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2315698 + ... + 2321149.

It is an arithmetic number, because the mean of its divisors is an integer number (1251948960).

Almost surely, 2^12640044922 is an apocalyptic number.

12640044922 is a deficient number, since it is larger than the sum of its proper divisors (7391138438).

12640044922 is a wasteful number, since it uses less digits than its factorization.

12640044922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636925.

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 12640044922 in words is "twelve billion, six hundred forty million, forty-four thousand, nine hundred twenty-two".