11111113888818 has 8 divisors (see below), whose sum is σ = 22222227777648. Its totient is φ = 3703704629604.

The previous prime is 11111113888817. The next prime is 11111113888909. The reversal of 11111113888818 is 81888831111111.

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

11111113888818 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (11111113888817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925926157396 + ... + 925926157407.

It is an arithmetic number, because the mean of its divisors is an integer number (2777778472206).

Almost surely, 2^{11111113888818} is an apocalyptic number.

11111113888818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111113888818 is a wasteful number, since it uses less digits than its factorization.

11111113888818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851852314808.

The product of its digits is 98304, while the sum is 51.

Adding to 11111113888818 its reverse (81888831111111), we get a palindrome (92999944999929).

The spelling of 11111113888818 in words is "eleven trillion, one hundred eleven billion, one hundred thirteen million, eight hundred eighty-eight thousand, eight hundred eighteen".