12117805756 has 24 divisors (see below), whose sum is σ = 24283254240. Its totient is φ = 5183136192.

The previous prime is 12117805709. The next prime is 12117805787. The reversal of 12117805756 is 65750871121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410875 + ... + 439378.

It is an arithmetic number, because the mean of its divisors is an integer number (1011802260).

Almost surely, 2^12117805756 is an apocalyptic number.

It is an amenable number.

12117805756 is an abundant number, since it is smaller than the sum of its proper divisors (12165448484).

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

12117805756 is a wasteful number, since it uses less digits than its factorization.

12117805756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850773 (or 850771 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 43.

The spelling of 12117805756 in words is "twelve billion, one hundred seventeen million, eight hundred five thousand, seven hundred fifty-six".