13279543617 has 4 divisors (see below), whose sum is σ = 17706058160. Its totient is φ = 8853029076.

The previous prime is 13279543579. The next prime is 13279543619. The reversal of 13279543617 is 71634597231.

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 not a de Polignac number, because 13279543617 - 2⁶ = 13279543553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13279543619) 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, 2213257267 + ... + 2213257272.

It is an arithmetic number, because the mean of its divisors is an integer number (4426514540).

Almost surely, 2^13279543617 is an apocalyptic number.

It is an amenable number.

13279543617 is a deficient number, since it is larger than the sum of its proper divisors (4426514543).

13279543617 is an equidigital number, since it uses as much as digits as its factorization.

13279543617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4426514542.

The product of its digits is 952560, while the sum is 48.

The spelling of 13279543617 in words is "thirteen billion, two hundred seventy-nine million, five hundred forty-three thousand, six hundred seventeen".