12643344116 has 24 divisors (see below), whose sum is σ = 25081939680. Its totient is φ = 5528263392.

The previous prime is 12643344047. The next prime is 12643344187. The reversal of 12643344116 is 61144334621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6397466 + ... + 6399441.

It is an arithmetic number, because the mean of its divisors is an integer number (1045080820).

Almost surely, 2^12643344116 is an apocalyptic number.

It is an amenable number.

12643344116 is a deficient number, since it is larger than the sum of its proper divisors (12438595564).

12643344116 is a wasteful number, since it uses less digits than its factorization.

12643344116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12796943 (or 12796941 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

Adding to 12643344116 its reverse (61144334621), we get a palindrome (73787678737).

The spelling of 12643344116 in words is "twelve billion, six hundred forty-three million, three hundred forty-four thousand, one hundred sixteen".