111572843828 has 6 divisors (see below), whose sum is σ = 195252476706. Its totient is φ = 55786421912.

The previous prime is 111572843813. The next prime is 111572843849. The reversal of 111572843828 is 828348275111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 100648831504 + 10924012324 = 317252^2 + 104518^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13946605475 + ... + 13946605482.

It is an arithmetic number, because the mean of its divisors is an integer number (32542079451).

Almost surely, 2^111572843828 is an apocalyptic number.

It is an amenable number.

111572843828 is a deficient number, since it is larger than the sum of its proper divisors (83679632878).

111572843828 is a wasteful number, since it uses less digits than its factorization.

111572843828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27893210961 (or 27893210959 counting only the distinct ones).

The product of its digits is 860160, while the sum is 50.

The spelling of 111572843828 in words is "one hundred eleven billion, five hundred seventy-two million, eight hundred forty-three thousand, eight hundred twenty-eight".