11181665055 has 96 divisors (see below), whose sum is σ = 20028625344. Its totient is φ = 5322240000.

The previous prime is 11181665039. The next prime is 11181665057. The reversal of 11181665055 is 55056618111.

It is not a de Polignac number, because 11181665055 - 2⁴ = 11181665039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11181665057) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 33179847 + ... + 33180183.

It is an arithmetic number, because the mean of its divisors is an integer number (208631514).

Almost surely, 2^11181665055 is an apocalyptic number.

11181665055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11181665055 is a deficient number, since it is larger than the sum of its proper divisors (8846960289).

11181665055 is a wasteful number, since it uses less digits than its factorization.

11181665055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 39.

The spelling of 11181665055 in words is "eleven billion, one hundred eighty-one million, six hundred sixty-five thousand, fifty-five".