13656314517 has 4 divisors (see below), whose sum is σ = 18208419360. Its totient is φ = 9104209676.

The previous prime is 13656314443. The next prime is 13656314521. The reversal of 13656314517 is 71541365631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13656314517 - 2¹⁹ = 13655790229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13656314527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276052417 + ... + 2276052422.

It is an arithmetic number, because the mean of its divisors is an integer number (4552104840).

Almost surely, 2^13656314517 is an apocalyptic number.

It is an amenable number.

13656314517 is a deficient number, since it is larger than the sum of its proper divisors (4552104843).

13656314517 is an equidigital number, since it uses as much as digits as its factorization.

13656314517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552104842.

The product of its digits is 226800, while the sum is 42.

The spelling of 13656314517 in words is "thirteen billion, six hundred fifty-six million, three hundred fourteen thousand, five hundred seventeen".