111556000155 has 32 divisors (see below), whose sum is σ = 183035483136. Its totient is φ = 57987224064.

The previous prime is 111556000141. The next prime is 111556000207. The reversal of 111556000155 is 551000655111.

It is not a de Polignac number, because 111556000155 - 2⁴ = 111556000139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111859 + ... + 485411.

It is an arithmetic number, because the mean of its divisors is an integer number (5719858848).

Almost surely, 2^111556000155 is an apocalyptic number.

111556000155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111556000155 is a deficient number, since it is larger than the sum of its proper divisors (71479482981).

111556000155 is a wasteful number, since it uses less digits than its factorization.

111556000155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374067.

The product of its (nonzero) digits is 3750, while the sum is 30.

Adding to 111556000155 its reverse (551000655111), we get a palindrome (662556655266).

The spelling of 111556000155 in words is "one hundred eleven billion, five hundred fifty-six million, one hundred fifty-five", and thus it is an aban number.