12156326826 has 32 divisors (see below), whose sum is σ = 27830837760. Its totient is φ = 3467617776.

The previous prime is 12156326779. The next prime is 12156326837. The reversal of 12156326826 is 62862365121.

12156326826 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 (42).

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 15 ways as a sum of consecutive naturals, for example, 207796 + ... + 259791.

It is an arithmetic number, because the mean of its divisors is an integer number (869713680).

Almost surely, 2^12156326826 is an apocalyptic number.

12156326826 is an abundant number, since it is smaller than the sum of its proper divisors (15674510934).

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

12156326826 is a wasteful number, since it uses less digits than its factorization.

12156326826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468218.

The product of its digits is 207360, while the sum is 42.

The spelling of 12156326826 in words is "twelve billion, one hundred fifty-six million, three hundred twenty-six thousand, eight hundred twenty-six".