12156622818 has 8 divisors (see below), whose sum is σ = 24313245648. Its totient is φ = 4052207604.

The previous prime is 12156622817. The next prime is 12156622831. The reversal of 12156622818 is 81822665121.

It is a sphenic number, since it is the product of 3 distinct primes.

12156622818 is an admirable number.

It is a super-2 number, since 2×12156622818² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12156622818.

It is not an unprimeable number, because it can be changed into a prime (12156622817) by changing a digit.

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, 1013051896 + ... + 1013051907.

It is an arithmetic number, because the mean of its divisors is an integer number (3039155706).

Almost surely, 2^12156622818 is an apocalyptic number.

12156622818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12156622818 is a wasteful number, since it uses less digits than its factorization.

12156622818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026103808.

The product of its digits is 92160, while the sum is 42.

The spelling of 12156622818 in words is "twelve billion, one hundred fifty-six million, six hundred twenty-two thousand, eight hundred eighteen".