12185864312 has 16 divisors (see below), whose sum is σ = 22849755360. Its totient is φ = 6092596224.

The previous prime is 12185864311. The next prime is 12185864321. The reversal of 12185864312 is 21346858121.

It is a self number, because there is not a number n which added to its sum of digits gives 12185864312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12185864311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183233 + ... + 240719.

It is an arithmetic number, because the mean of its divisors is an integer number (1428109710).

Almost surely, 2^12185864312 is an apocalyptic number.

It is an amenable number.

12185864312 is a deficient number, since it is larger than the sum of its proper divisors (10663891048).

12185864312 is a wasteful number, since it uses less digits than its factorization.

12185864312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83990 (or 83986 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The spelling of 12185864312 in words is "twelve billion, one hundred eighty-five million, eight hundred sixty-four thousand, three hundred twelve".