12165358806 has 24 divisors (see below), whose sum is σ = 26372393424. Its totient is φ = 4052947920.

The previous prime is 12165358781. The next prime is 12165358811. The reversal of 12165358806 is 60885356121.

12165358806 is a `hidden beast` number, since 1 + 2 + 1 + 65 + 3 + 588 + 0 + 6 = 666.

12165358806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 146250 + ... + 213821.

It is an arithmetic number, because the mean of its divisors is an integer number (1098849726).

Almost surely, 2^12165358806 is an apocalyptic number.

12165358806 is an abundant number, since it is smaller than the sum of its proper divisors (14207034618).

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

12165358806 is a wasteful number, since it uses less digits than its factorization.

12165358806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361956 (or 361953 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 12165358806 in words is "twelve billion, one hundred sixty-five million, three hundred fifty-eight thousand, eight hundred six".