13656617699 has 4 divisors (see below), whose sum is σ = 13657628736. Its totient is φ = 13655606664.

The previous prime is 13656617693. The next prime is 13656617731. The reversal of 13656617699 is 99671665631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13656617699 - 2²⁸ = 13388182243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13656617693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484979 + ... + 512364.

It is an arithmetic number, because the mean of its divisors is an integer number (3414407184).

Almost surely, 2^13656617699 is an apocalyptic number.

13656617699 is a deficient number, since it is larger than the sum of its proper divisors (1011037).

13656617699 is an equidigital number, since it uses as much as digits as its factorization.

13656617699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011036.

The product of its digits is 11022480, while the sum is 59.

The spelling of 13656617699 in words is "thirteen billion, six hundred fifty-six million, six hundred seventeen thousand, six hundred ninety-nine".