111728451678 has 16 divisors (see below), whose sum is σ = 223460751360. Its totient is φ = 37242175896.

The previous prime is 111728451643. The next prime is 111728451683. The reversal of 111728451678 is 876154827111.

111728451678 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111728451678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334701 + ... + 579207.

It is an arithmetic number, because the mean of its divisors is an integer number (13966296960).

Almost surely, 2^111728451678 is an apocalyptic number.

111728451678 is an abundant number, since it is smaller than the sum of its proper divisors (111732299682).

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

111728451678 is a wasteful number, since it uses less digits than its factorization.

111728451678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320671.

The product of its digits is 752640, while the sum is 51.

The spelling of 111728451678 in words is "one hundred eleven billion, seven hundred twenty-eight million, four hundred fifty-one thousand, six hundred seventy-eight".