12017138856 has 32 divisors (see below), whose sum is σ = 30046812000. Its totient is φ = 4005184320.

The previous prime is 12017138803. The next prime is 12017138899. The reversal of 12017138856 is 65883171021.

12017138856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180870 + ... + 238218.

It is an arithmetic number, because the mean of its divisors is an integer number (938962875).

Almost surely, 2^12017138856 is an apocalyptic number.

It is an amenable number.

12017138856 is an abundant number, since it is smaller than the sum of its proper divisors (18029673144).

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

12017138856 is a wasteful number, since it uses less digits than its factorization.

12017138856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66089 (or 66085 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 12017138856 in words is "twelve billion, seventeen million, one hundred thirty-eight thousand, eight hundred fifty-six".