13444557800 has 24 divisors (see below), whose sum is σ = 31258597350. Its totient is φ = 5377823040.

The previous prime is 13444557781. The next prime is 13444557809. The reversal of 13444557800 is 875544431.

It can be written as a sum of positive squares in 3 ways, for example, as 12971843236 + 472714564 = 113894^2 + 21742^2 .

It is a super-2 number, since 2×13444557800² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13444557809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33611195 + ... + 33611594.

Almost surely, 2^13444557800 is an apocalyptic number.

13444557800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13444557800 is an abundant number, since it is smaller than the sum of its proper divisors (17814039550).

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

13444557800 is a wasteful number, since it uses less digits than its factorization.

13444557800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67222805 (or 67222796 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 41.

The spelling of 13444557800 in words is "thirteen billion, four hundred forty-four million, five hundred fifty-seven thousand, eight hundred".