111556551911 has 16 divisors (see below), whose sum is σ = 136093570560. Its totient is φ = 89311390560.

The previous prime is 111556551907. The next prime is 111556551943. The reversal of 111556551911 is 119155655111.

It is not a de Polignac number, because 111556551911 - 2² = 111556551907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111556551961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5897396 + ... + 5916281.

It is an arithmetic number, because the mean of its divisors is an integer number (8505848160).

Almost surely, 2^111556551911 is an apocalyptic number.

111556551911 is a deficient number, since it is larger than the sum of its proper divisors (24537018649).

111556551911 is a wasteful number, since it uses less digits than its factorization.

111556551911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11813774.

The product of its digits is 33750, while the sum is 41.

The spelling of 111556551911 in words is "one hundred eleven billion, five hundred fifty-six million, five hundred fifty-one thousand, nine hundred eleven".