13799707778 has 16 divisors (see below), whose sum is σ = 20887533720. Its totient is φ = 6837374976.

The previous prime is 13799707759. The next prime is 13799707783. The reversal of 13799707778 is 87770799731.

It can be written as a sum of positive squares in 4 ways, for example, as 12329215369 + 1470492409 = 111037^2 + 38347^2 .

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, 111650 + ... + 200162.

Almost surely, 2^13799707778 is an apocalyptic number.

13799707778 is a deficient number, since it is larger than the sum of its proper divisors (7087825942).

13799707778 is a wasteful number, since it uses less digits than its factorization.

13799707778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89221.

The product of its (nonzero) digits is 32672808, while the sum is 65.

The spelling of 13799707778 in words is "thirteen billion, seven hundred ninety-nine million, seven hundred seven thousand, seven hundred seventy-eight".