11155858161 has 32 divisors (see below), whose sum is σ = 17079828480. Its totient is φ = 6344696064.

The previous prime is 11155858157. The next prime is 11155858163. The reversal of 11155858161 is 16185855111.

11155858161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11155858161 - 2² = 11155858157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11155858163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4768330 + ... + 4770668.

It is an arithmetic number, because the mean of its divisors is an integer number (533744640).

Almost surely, 2^11155858161 is an apocalyptic number.

It is an amenable number.

11155858161 is a deficient number, since it is larger than the sum of its proper divisors (5923970319).

11155858161 is a wasteful number, since it uses less digits than its factorization.

11155858161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325.

The product of its digits is 48000, while the sum is 42.

The spelling of 11155858161 in words is "eleven billion, one hundred fifty-five million, eight hundred fifty-eight thousand, one hundred sixty-one".