11813400909 has 16 divisors (see below), whose sum is σ = 17504049600. Its totient is φ = 7874378928.

The previous prime is 11813400881. The next prime is 11813400931. The reversal of 11813400909 is 90900431811.

It is not a de Polignac number, because 11813400909 - 2²⁴ = 11796623693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11813408909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164422 + ... + 225080.

It is an arithmetic number, because the mean of its divisors is an integer number (1094003100).

Almost surely, 2^11813400909 is an apocalyptic number.

It is an amenable number.

11813400909 is a deficient number, since it is larger than the sum of its proper divisors (5690648691).

11813400909 is an equidigital number, since it uses as much as digits as its factorization.

11813400909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67881 (or 67875 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The spelling of 11813400909 in words is "eleven billion, eight hundred thirteen million, four hundred thousand, nine hundred nine".