13111531444 has 18 divisors (see below), whose sum is σ = 25220736002. Its totient is φ = 5959786800.

The previous prime is 13111531429. The next prime is 13111531451. The reversal of 13111531444 is 44413511131.

It can be written as a sum of positive squares in only one way, i.e., 11787444900 + 1324086544 = 108570^2 + 36388^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13544487 + ... + 13545454.

Almost surely, 2^13111531444 is an apocalyptic number.

It is an amenable number.

13111531444 is a deficient number, since it is larger than the sum of its proper divisors (12109204558).

13111531444 is a wasteful number, since it uses less digits than its factorization.

13111531444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27089967 (or 27089954 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The spelling of 13111531444 in words is "thirteen billion, one hundred eleven million, five hundred thirty-one thousand, four hundred forty-four".