11518344409 has 48 divisors (see below), whose sum is σ = 14498217216. Its totient is φ = 9069540480.

The previous prime is 11518344403. The next prime is 11518344419. The reversal of 11518344409 is 90444381511.

It is a happy number.

It is not a de Polignac number, because 11518344409 - 2³ = 11518344401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11518344401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1914484 + ... + 1920490.

It is an arithmetic number, because the mean of its divisors is an integer number (302046192).

Almost surely, 2^11518344409 is an apocalyptic number.

It is an amenable number.

11518344409 is a deficient number, since it is larger than the sum of its proper divisors (2979872807).

11518344409 is a wasteful number, since it uses less digits than its factorization.

11518344409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6118 (or 6107 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 11518344409 in words is "eleven billion, five hundred eighteen million, three hundred forty-four thousand, four hundred nine".