11185899459 has 64 divisors (see below), whose sum is σ = 18330762240. Its totient is φ = 5931394560.

The previous prime is 11185899449. The next prime is 11185899481. The reversal of 11185899459 is 95499858111.

It is a happy number.

It is not a de Polignac number, because 11185899459 - 2⁴ = 11185899443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11185899449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1867249 + ... + 1873229.

It is an arithmetic number, because the mean of its divisors is an integer number (286418160).

Almost surely, 2^11185899459 is an apocalyptic number.

11185899459 is a deficient number, since it is larger than the sum of its proper divisors (7144862781).

11185899459 is a wasteful number, since it uses less digits than its factorization.

11185899459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6140.

The product of its digits is 4665600, while the sum is 60.

The spelling of 11185899459 in words is "eleven billion, one hundred eighty-five million, eight hundred ninety-nine thousand, four hundred fifty-nine".