111161123556 has 48 divisors (see below), whose sum is σ = 303659664000. Its totient is φ = 30985678080.

The previous prime is 111161123543. The next prime is 111161123573. The reversal of 111161123556 is 655321161111.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16134931 + ... + 16141818.

It is an arithmetic number, because the mean of its divisors is an integer number (6326243000).

Almost surely, 2^111161123556 is an apocalyptic number.

It is an amenable number.

111161123556 is an abundant number, since it is smaller than the sum of its proper divisors (192498540444).

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

111161123556 is a wasteful number, since it uses less digits than its factorization.

111161123556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32276804 (or 32276802 counting only the distinct ones).

The product of its digits is 5400, while the sum is 33.

Adding to 111161123556 its reverse (655321161111), we get a palindrome (766482284667).

The spelling of 111161123556 in words is "one hundred eleven billion, one hundred sixty-one million, one hundred twenty-three thousand, five hundred fifty-six".