11090911909 has 36 divisors (see below), whose sum is σ = 14322358764. Its totient is φ = 8556240000.

The previous prime is 11090911901. The next prime is 11090911957. The reversal of 11090911909 is 90911909011.

It can be written as a sum of positive squares in 2 ways, for example, as 10885792225 + 205119684 = 104335^2 + 14322^2 .

It is not a de Polignac number, because 11090911909 - 2³ = 11090911901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11090911901) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 589569 + ... + 608089.

It is an arithmetic number, because the mean of its divisors is an integer number (397843299).

Almost surely, 2^11090911909 is an apocalyptic number.

It is an amenable number.

11090911909 is a deficient number, since it is larger than the sum of its proper divisors (3231446855).

11090911909 is a wasteful number, since it uses less digits than its factorization.

11090911909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18658 (or 18640 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 40.

The spelling of 11090911909 in words is "eleven billion, ninety million, nine hundred eleven thousand, nine hundred nine".