13664271605 has 24 divisors (see below), whose sum is σ = 16963808256. Its totient is φ = 10565886240.

The previous prime is 13664271571. The next prime is 13664271613. The reversal of 13664271605 is 50617246631.

It is not a de Polignac number, because 13664271605 - 2²⁰ = 13663223029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6375164 + ... + 6377306.

It is an arithmetic number, because the mean of its divisors is an integer number (706825344).

Almost surely, 2^13664271605 is an apocalyptic number.

It is an amenable number.

13664271605 is a deficient number, since it is larger than the sum of its proper divisors (3299536651).

13664271605 is a wasteful number, since it uses less digits than its factorization.

13664271605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537 (or 3506 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 13664271605 in words is "thirteen billion, six hundred sixty-four million, two hundred seventy-one thousand, six hundred five".