11185507209 has 8 divisors (see below), whose sum is σ = 15277766112. Its totient is φ = 7275126560.

The previous prime is 11185507199. The next prime is 11185507211. The reversal of 11185507209 is 90270558111.

11185507209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11185507209 - 2⁹ = 11185506697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11185507279) 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 7 ways as a sum of consecutive naturals, for example, 45469419 + ... + 45469664.

It is an arithmetic number, because the mean of its divisors is an integer number (1909720764).

Almost surely, 2^11185507209 is an apocalyptic number.

It is an amenable number.

11185507209 is a deficient number, since it is larger than the sum of its proper divisors (4092258903).

11185507209 is an equidigital number, since it uses as much as digits as its factorization.

11185507209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90939127.

The product of its (nonzero) digits is 25200, while the sum is 39.

The spelling of 11185507209 in words is "eleven billion, one hundred eighty-five million, five hundred seven thousand, two hundred nine".