11551665009 has 8 divisors (see below), whose sum is σ = 15404102560. Its totient is φ = 7700168736.

The previous prime is 11551664989. The next prime is 11551665023. The reversal of 11551665009 is 90056615511.

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

It is not a de Polignac number, because 11551665009 - 2⁸ = 11551664753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11551665079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206167 + ... + 256140.

It is an arithmetic number, because the mean of its divisors is an integer number (1925512820).

Almost surely, 2^11551665009 is an apocalyptic number.

It is an amenable number.

11551665009 is a deficient number, since it is larger than the sum of its proper divisors (3852437551).

11551665009 is an equidigital number, since it uses as much as digits as its factorization.

11551665009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470639.

The product of its (nonzero) digits is 40500, while the sum is 39.

The spelling of 11551665009 in words is "eleven billion, five hundred fifty-one million, six hundred sixty-five thousand, nine".