12138642216 has 96 divisors (see below), whose sum is σ = 33081890400. Its totient is φ = 4020900480.

The previous prime is 12138642203. The next prime is 12138642287. The reversal of 12138642216 is 61224683121.

It is a happy number.

12138642216 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 8 + 642 + 2 + 1 + 6 = 666.

12138642216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

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 23 ways as a sum of consecutive naturals, for example, 13382835 + ... + 13383741.

It is an arithmetic number, because the mean of its divisors is an integer number (344603025).

Almost surely, 2^12138642216 is an apocalyptic number.

It is an amenable number.

12138642216 is an abundant number, since it is smaller than the sum of its proper divisors (20943248184).

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

12138642216 is a wasteful number, since it uses less digits than its factorization.

12138642216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879 (or 1872 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The spelling of 12138642216 in words is "twelve billion, one hundred thirty-eight million, six hundred forty-two thousand, two hundred sixteen".