12191683944 has 128 divisors (see below), whose sum is σ = 35523417600. Its totient is φ = 3447671040.

The previous prime is 12191683901. The next prime is 12191683961. The reversal of 12191683944 is 44938619121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12191683893 and 12191683902.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 317934 + ... + 354210.

It is an arithmetic number, because the mean of its divisors is an integer number (277526700).

Almost surely, 2^12191683944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12191683944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17761708800).

12191683944 is an abundant number, since it is smaller than the sum of its proper divisors (23331733656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12191683944 is a wasteful number, since it uses less digits than its factorization.

12191683944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36383 (or 36379 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The spelling of 12191683944 in words is "twelve billion, one hundred ninety-one million, six hundred eighty-three thousand, nine hundred forty-four".