13931392356 has 144 divisors (see below), whose sum is σ = 42723233280. Its totient is φ = 3736627200.

The previous prime is 13931392313. The next prime is 13931392369. The reversal of 13931392356 is 65329313931.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1748181 + ... + 1756131.

It is an arithmetic number, because the mean of its divisors is an integer number (296689120).

Almost surely, 2^13931392356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13931392356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21361616640).

13931392356 is an abundant number, since it is smaller than the sum of its proper divisors (28791840924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13931392356 is a wasteful number, since it uses less digits than its factorization.

13931392356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8394 (or 8389 counting only the distinct ones).

The product of its digits is 393660, while the sum is 45.

The spelling of 13931392356 in words is "thirteen billion, nine hundred thirty-one million, three hundred ninety-two thousand, three hundred fifty-six".