13444578889 has 32 divisors (see below), whose sum is σ = 16133888000. Its totient is φ = 11190674880.

The previous prime is 13444578857. The next prime is 13444578893. The reversal of 13444578889 is 98887544431.

It is not a de Polignac number, because 13444578889 - 2⁵ = 13444578857 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (13444578289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12576247 + ... + 12577315.

It is an arithmetic number, because the mean of its divisors is an integer number (504184000).

Almost surely, 2^13444578889 is an apocalyptic number.

13444578889 is the 73334-th heptagonal number.

It is an amenable number.

13444578889 is a deficient number, since it is larger than the sum of its proper divisors (2689309111).

13444578889 is an equidigital number, since it uses as much as digits as its factorization.

13444578889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118 (or 2104 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 61.

The spelling of 13444578889 in words is "thirteen billion, four hundred forty-four million, five hundred seventy-eight thousand, eight hundred eighty-nine".