13722745644 has 36 divisors (see below), whose sum is σ = 36728526744. Its totient is φ = 4305174912.

The previous prime is 13722745643. The next prime is 13722745681. The reversal of 13722745644 is 44654722731.

13722745644 is a `hidden beast` number, since 1 + 372 + 274 + 5 + 6 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13722745644.

It is not an unprimeable number, because it can be changed into a prime (13722745643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11210782 + ... + 11212005.

It is an arithmetic number, because the mean of its divisors is an integer number (1020236854).

Almost surely, 2^13722745644 is an apocalyptic number.

It is an amenable number.

13722745644 is an abundant number, since it is smaller than the sum of its proper divisors (23005781100).

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

13722745644 is a wasteful number, since it uses less digits than its factorization.

13722745644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22422814 (or 22422809 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 45.

The spelling of 13722745644 in words is "thirteen billion, seven hundred twenty-two million, seven hundred forty-five thousand, six hundred forty-four".