111728888889 has 16 divisors (see below), whose sum is σ = 149205848064. Its totient is φ = 74369005200.

The previous prime is 111728888867. The next prime is 111728888893. The reversal of 111728888889 is 988888827111.

It is not a de Polignac number, because 111728888889 - 2²⁰ = 111727840313 is a prime.

It is a super-2 number, since 2×111728888889² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111728888489) 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 15 ways as a sum of consecutive naturals, for example, 7067584 + ... + 7083374.

It is an arithmetic number, because the mean of its divisors is an integer number (9325365504).

Almost surely, 2^111728888889 is an apocalyptic number.

It is an amenable number.

111728888889 is a deficient number, since it is larger than the sum of its proper divisors (37476959175).

111728888889 is a wasteful number, since it uses less digits than its factorization.

111728888889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19348.

The product of its digits is 33030144, while the sum is 69.

The spelling of 111728888889 in words is "one hundred eleven billion, seven hundred twenty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-nine".