13129988444 has 24 divisors (see below), whose sum is σ = 23256573648. Its totient is φ = 6485633280.

The previous prime is 13129988423. The next prime is 13129988453. The reversal of 13129988444 is 44488992131.

It is a super-2 number, since 2×13129988444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 91454 + ... + 186074.

It is an arithmetic number, because the mean of its divisors is an integer number (969023902).

Almost surely, 2^13129988444 is an apocalyptic number.

It is an amenable number.

13129988444 is a deficient number, since it is larger than the sum of its proper divisors (10126585204).

13129988444 is a wasteful number, since it uses less digits than its factorization.

13129988444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95045 (or 95043 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 53.

The spelling of 13129988444 in words is "thirteen billion, one hundred twenty-nine million, nine hundred eighty-eight thousand, four hundred forty-four".