13444446888889 has 9 divisors (see below), whose sum is σ = 13463728146063. Its totient is φ = 13425193220472.

The previous prime is 13444446888877. The next prime is 13444446888913. The reversal of 13444446888889 is 98888864444431.

The square root of 13444446888889 is 3666667.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7739896792489 + 5704550096400 = 2782067^2 + 2388420^2 .

It is not a de Polignac number, because 13444446888889 - 2²³ = 13444438500281 is a prime.

It is a super-2 number, since 2×13444446888889² (a number of 27 digits) contains 22 as substring.

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 (13444446888839) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3039664732 + ... + 3039669154.

It is an arithmetic number, because the mean of its divisors is an integer number (1495969794007).

Almost surely, 2^{13444446888889} is an apocalyptic number.

13444446888889 is the 3666667-th square number.

13444446888889 is the 1833334-th centered octagonal number.

It is an amenable number.

13444446888889 is a deficient number, since it is larger than the sum of its proper divisors (19281257174).

13444446888889 is an frugal number, since it uses more digits than its factorization.

13444446888889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10504 (or 5252 counting only the distinct ones).

The product of its digits is 5435817984, while the sum is 79.

The spelling of 13444446888889 in words is "thirteen trillion, four hundred forty-four billion, four hundred forty-six million, eight hundred eighty-eight thousand, eight hundred eighty-nine".