13608979664 has 160 divisors (see below), whose sum is σ = 32663814144. Its totient is φ = 5364817920.

The previous prime is 13608979619. The next prime is 13608979717. The reversal of 13608979664 is 46697980631.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15411767 + ... + 15412649.

Almost surely, 2^13608979664 is an apocalyptic number.

13608979664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13608979664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16331907072).

13608979664 is an abundant number, since it is smaller than the sum of its proper divisors (19054834480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13608979664 is a wasteful number, since it uses less digits than its factorization.

13608979664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 59.

The spelling of 13608979664 in words is "thirteen billion, six hundred eight million, nine hundred seventy-nine thousand, six hundred sixty-four".