12319871956 has 48 divisors (see below), whose sum is σ = 24842782720. Its totient is φ = 5236552800.

The previous prime is 12319871939. The next prime is 12319871989. The reversal of 12319871956 is 65917891321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3122521 + ... + 3126463.

Almost surely, 2^12319871956 is an apocalyptic number.

It is an amenable number.

12319871956 is an abundant number, since it is smaller than the sum of its proper divisors (12522910764).

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

12319871956 is a wasteful number, since it uses less digits than its factorization.

12319871956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4844 (or 4842 counting only the distinct ones).

The product of its digits is 816480, while the sum is 52.

The spelling of 12319871956 in words is "twelve billion, three hundred nineteen million, eight hundred seventy-one thousand, nine hundred fifty-six".