13604691968 has 112 divisors (see below), whose sum is σ = 31567550784. Its totient is φ = 5741936640.

The previous prime is 13604691967. The next prime is 13604691979. The reversal of 13604691968 is 86919640631.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (13604691967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3840278 + ... + 3843818.

It is an arithmetic number, because the mean of its divisors is an integer number (281853132).

Almost surely, 2^13604691968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13604691968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15783775392).

13604691968 is an abundant number, since it is smaller than the sum of its proper divisors (17962858816).

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

13604691968 is an frugal number, since it uses more digits than its factorization.

13604691968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641 (or 3617 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 13604691968 in words is "thirteen billion, six hundred four million, six hundred ninety-one thousand, nine hundred sixty-eight".