12291978772176 has 40 divisors (see below), whose sum is σ = 31778353168320. Its totient is φ = 4094219847936.

The previous prime is 12291978772147. The next prime is 12291978772247. The reversal of 12291978772176 is 67127787919221.

It is a self number, because there is not a number n which added to its sum of digits gives 12291978772176.

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, 97011325 + ... + 97137948.

It is an arithmetic number, because the mean of its divisors is an integer number (794458829208).

Almost surely, 2^{12291978772176} is an apocalyptic number.

12291978772176 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12291978772176 is an abundant number, since it is smaller than the sum of its proper divisors (19486374396144).

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

12291978772176 is a wasteful number, since it uses less digits than its factorization.

12291978772176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194150603 (or 194150597 counting only the distinct ones).

The product of its digits is 74680704, while the sum is 69.

The spelling of 12291978772176 in words is "twelve trillion, two hundred ninety-one billion, nine hundred seventy-eight million, seven hundred seventy-two thousand, one hundred seventy-six".