11155500550161 has 32 divisors (see below), whose sum is σ = 18029713674240. Its totient is φ = 6760676221200.

The previous prime is 11155500550133. The next prime is 11155500550169. The reversal of 11155500550161 is 16105500555111.

11155500550161 is a `hidden beast` number, since 1 + 1 + 1 + 55 + 50 + 0 + 550 + 1 + 6 + 1 = 666.

It is not a de Polignac number, because 11155500550161 - 2³³ = 11146910615569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11155500550169) 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 31 ways as a sum of consecutive naturals, for example, 8179336 + ... + 9445238.

It is an arithmetic number, because the mean of its divisors is an integer number (563428552320).

Almost surely, 2^{11155500550161} is an apocalyptic number.

11155500550161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11155500550161 is a deficient number, since it is larger than the sum of its proper divisors (6874213124079).

11155500550161 is a wasteful number, since it uses less digits than its factorization.

11155500550161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295594 (or 1295588 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 36.

The spelling of 11155500550161 in words is "eleven trillion, one hundred fifty-five billion, five hundred million, five hundred fifty thousand, one hundred sixty-one".