13720967361 has 12 divisors (see below), whose sum is σ = 20090671588. Its totient is φ = 9022005504.

The previous prime is 13720967357. The next prime is 13720967399. The reversal of 13720967361 is 16376902731.

It can be written as a sum of positive squares in 2 ways, for example, as 2602530225 + 11118437136 = 51015^2 + 105444^2 .

It is not a de Polignac number, because 13720967361 - 2² = 13720967357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13720967311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10441480 + ... + 10442793.

Almost surely, 2^13720967361 is an apocalyptic number.

It is an amenable number.

13720967361 is a deficient number, since it is larger than the sum of its proper divisors (6369704227).

13720967361 is a wasteful number, since it uses less digits than its factorization.

13720967361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20884352 (or 20884349 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The spelling of 13720967361 in words is "thirteen billion, seven hundred twenty million, nine hundred sixty-seven thousand, three hundred sixty-one".