13317644279 has 4 divisors (see below), whose sum is σ = 13373366880. Its totient is φ = 13261921680.

The previous prime is 13317644273. The next prime is 13317644303. The reversal of 13317644279 is 97244671331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13317644279 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 (13317644273) 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, 27860942 + ... + 27861419.

It is an arithmetic number, because the mean of its divisors is an integer number (3343341720).

Almost surely, 2^13317644279 is an apocalyptic number.

13317644279 is a deficient number, since it is larger than the sum of its proper divisors (55722601).

13317644279 is an equidigital number, since it uses as much as digits as its factorization.

13317644279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55722600.

The product of its digits is 762048, while the sum is 47.

The spelling of 13317644279 in words is "thirteen billion, three hundred seventeen million, six hundred forty-four thousand, two hundred seventy-nine".