12181664732 has 12 divisors (see below), whose sum is σ = 21771486240. Its totient is φ = 5961240096.

The previous prime is 12181664723. The next prime is 12181664773. The reversal of 12181664732 is 23746618121.

It is a self number, because there is not a number n which added to its sum of digits gives 12181664732.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32397857 + ... + 32398232.

It is an arithmetic number, because the mean of its divisors is an integer number (1814290520).

Almost surely, 2^12181664732 is an apocalyptic number.

It is an amenable number.

12181664732 is a deficient number, since it is larger than the sum of its proper divisors (9589821508).

12181664732 is a wasteful number, since it uses less digits than its factorization.

12181664732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64796140 (or 64796138 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The spelling of 12181664732 in words is "twelve billion, one hundred eighty-one million, six hundred sixty-four thousand, seven hundred thirty-two".