13312944778 has 16 divisors (see below), whose sum is σ = 23814460800. Its totient is φ = 5457480336.

The previous prime is 13312944767. The next prime is 13312944809. The reversal of 13312944778 is 87744921331.

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, 20671953 + ... + 20672596.

It is an arithmetic number, because the mean of its divisors is an integer number (1488403800).

Almost surely, 2^13312944778 is an apocalyptic number.

13312944778 is a deficient number, since it is larger than the sum of its proper divisors (10501516022).

13312944778 is a wasteful number, since it uses less digits than its factorization.

13312944778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41344581.

The product of its digits is 1016064, while the sum is 49.

The spelling of 13312944778 in words is "thirteen billion, three hundred twelve million, nine hundred forty-four thousand, seven hundred seventy-eight".