11409312109 has 16 divisors (see below), whose sum is σ = 12937489600. Its totient is φ = 9974399616.

The previous prime is 11409312107. The next prime is 11409312121. The reversal of 11409312109 is 90121390411.

It is a cyclic number.

It is not a de Polignac number, because 11409312109 - 2¹ = 11409312107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11409312107) 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, 1423417 + ... + 1431409.

It is an arithmetic number, because the mean of its divisors is an integer number (808593100).

Almost surely, 2^11409312109 is an apocalyptic number.

11409312109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11409312109 is a deficient number, since it is larger than the sum of its proper divisors (1528177491).

11409312109 is a wasteful number, since it uses less digits than its factorization.

11409312109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13804.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 11409312109 in words is "eleven billion, four hundred nine million, three hundred twelve thousand, one hundred nine".