12171823256 has 16 divisors (see below), whose sum is σ = 23001872640. Its totient is φ = 6037990560.

The previous prime is 12171823219. The next prime is 12171823271. The reversal of 12171823256 is 65232817121.

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, 5989055 + ... + 5991086.

It is an arithmetic number, because the mean of its divisors is an integer number (1437617040).

Almost surely, 2^12171823256 is an apocalyptic number.

It is an amenable number.

12171823256 is a deficient number, since it is larger than the sum of its proper divisors (10830049384).

12171823256 is a wasteful number, since it uses less digits than its factorization.

12171823256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11980274 (or 11980270 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The spelling of 12171823256 in words is "twelve billion, one hundred seventy-one million, eight hundred twenty-three thousand, two hundred fifty-six".