12868409091 has 32 divisors (see below), whose sum is σ = 18407980800. Its totient is φ = 7972732800.

The previous prime is 12868409083. The next prime is 12868409093. The reversal of 12868409091 is 19090486821.

12868409091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12868409091 - 2³ = 12868409083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12868409091.

It is not an unprimeable number, because it can be changed into a prime (12868409093) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 617260 + ... + 637766.

It is an arithmetic number, because the mean of its divisors is an integer number (575249400).

Almost surely, 2^12868409091 is an apocalyptic number.

12868409091 is a deficient number, since it is larger than the sum of its proper divisors (5539571709).

12868409091 is a wasteful number, since it uses less digits than its factorization.

12868409091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20739.

The product of its (nonzero) digits is 248832, while the sum is 48.

The spelling of 12868409091 in words is "twelve billion, eight hundred sixty-eight million, four hundred nine thousand, ninety-one".