13444613556 has 96 divisors (see below), whose sum is σ = 35616430080. Its totient is φ = 3909897600.

The previous prime is 13444613551. The next prime is 13444613593. The reversal of 13444613556 is 65531644431.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13444613551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 628761 + ... + 649791.

It is an arithmetic number, because the mean of its divisors is an integer number (371004480).

Almost surely, 2^13444613556 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 13444613556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17808215040).

13444613556 is an abundant number, since it is smaller than the sum of its proper divisors (22171816524).

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

13444613556 is a wasteful number, since it uses less digits than its factorization.

13444613556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21245 (or 21243 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The spelling of 13444613556 in words is "thirteen billion, four hundred forty-four million, six hundred thirteen thousand, five hundred fifty-six".