12438513944 has 16 divisors (see below), whose sum is σ = 23329392720. Its totient is φ = 6217342560.

The previous prime is 12438513937. The next prime is 12438513953. The reversal of 12438513944 is 44931583421.

It is a super-3 number, since 3×12438513944³ (a number of 31 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12438513895 and 12438513904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211499 + ... + 263834.

It is an arithmetic number, because the mean of its divisors is an integer number (1458087045).

Almost surely, 2^12438513944 is an apocalyptic number.

It is an amenable number.

12438513944 is a deficient number, since it is larger than the sum of its proper divisors (10890878776).

12438513944 is a wasteful number, since it uses less digits than its factorization.

12438513944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478610 (or 478606 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The spelling of 12438513944 in words is "twelve billion, four hundred thirty-eight million, five hundred thirteen thousand, nine hundred forty-four".