13581760044 has 144 divisors (see below), whose sum is σ = 34393632000. Its totient is φ = 4169335680.

The previous prime is 13581760043. The next prime is 13581760051. The reversal of 13581760044 is 44006718531.

It is a junction number, because it is equal to n+sod(n) for n = 13581759984 and 13581760011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13581760043) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27217707 + ... + 27218205.

Almost surely, 2^13581760044 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 13581760044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17196816000).

13581760044 is an abundant number, since it is smaller than the sum of its proper divisors (20811871956).

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

13581760044 is a wasteful number, since it uses less digits than its factorization.

13581760044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 13581760044 in words is "thirteen billion, five hundred eighty-one million, seven hundred sixty thousand, forty-four".