13644872556 has 48 divisors (see below), whose sum is σ = 36462397440. Its totient is φ = 3890384640.

The previous prime is 13644872519. The next prime is 13644872557. The reversal of 13644872556 is 65527844631.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13644872499 and 13644872508.

It is not an unprimeable number, because it can be changed into a prime (13644872557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129325 + ... + 209796.

It is an arithmetic number, because the mean of its divisors is an integer number (759633280).

Almost surely, 2^13644872556 is an apocalyptic number.

It is an amenable number.

13644872556 is an abundant number, since it is smaller than the sum of its proper divisors (22817524884).

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

13644872556 is a wasteful number, since it uses less digits than its factorization.

13644872556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339614 (or 339612 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 51.

The spelling of 13644872556 in words is "thirteen billion, six hundred forty-four million, eight hundred seventy-two thousand, five hundred fifty-six".