12939949844 has 6 divisors (see below), whose sum is σ = 22644912234. Its totient is φ = 6469974920.

The previous prime is 12939949787. The next prime is 12939949871. The reversal of 12939949844 is 44894993921.

12939949844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7196128900 + 5743820944 = 84830^2 + 75788^2 .

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 as a sum of consecutive naturals, namely, 1617493727 + ... + 1617493734.

It is an arithmetic number, because the mean of its divisors is an integer number (3774152039).

Almost surely, 2^12939949844 is an apocalyptic number.

It is an amenable number.

12939949844 is a deficient number, since it is larger than the sum of its proper divisors (9704962390).

12939949844 is a wasteful number, since it uses less digits than its factorization.

12939949844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234987465 (or 3234987463 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 62.

The spelling of 12939949844 in words is "twelve billion, nine hundred thirty-nine million, nine hundred forty-nine thousand, eight hundred forty-four".