13399965845 has 32 divisors (see below), whose sum is σ = 19475520768. Its totient is φ = 8640304128.

The previous prime is 13399965841. The next prime is 13399965883. The reversal of 13399965845 is 54856999331.

It is not a de Polignac number, because 13399965845 - 2² = 13399965841 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13399965841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 696779 + ... + 715751.

It is an arithmetic number, because the mean of its divisors is an integer number (608610024).

Almost surely, 2^13399965845 is an apocalyptic number.

It is an amenable number.

13399965845 is a deficient number, since it is larger than the sum of its proper divisors (6075554923).

13399965845 is a wasteful number, since it uses less digits than its factorization.

13399965845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20189.

The product of its digits is 31492800, while the sum is 62.

The spelling of 13399965845 in words is "thirteen billion, three hundred ninety-nine million, nine hundred sixty-five thousand, eight hundred forty-five".