11181755868 has 12 divisors (see below), whose sum is σ = 26090763720. Its totient is φ = 3727251952.

The previous prime is 11181755867. The next prime is 11181755891. The reversal of 11181755868 is 86855718111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 11181755868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11181755861) 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, 465906483 + ... + 465906506.

It is an arithmetic number, because the mean of its divisors is an integer number (2174230310).

Almost surely, 2^11181755868 is an apocalyptic number.

It is an amenable number.

11181755868 is an abundant number, since it is smaller than the sum of its proper divisors (14909007852).

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

11181755868 is a wasteful number, since it uses less digits than its factorization.

11181755868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931812996 (or 931812994 counting only the distinct ones).

The product of its digits is 537600, while the sum is 51.

The spelling of 11181755868 in words is "eleven billion, one hundred eighty-one million, seven hundred fifty-five thousand, eight hundred sixty-eight".