111145644 has 36 divisors (see below), whose sum is σ = 281342880. Its totient is φ = 36996960.

The previous prime is 111145597. The next prime is 111145663. The reversal of 111145644 is 446541111.

111145644 is a `hidden beast` number, since 1 + 1 + 1 + 14 + 5 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 31102 + ... + 34490.

It is an arithmetic number, because the mean of its divisors is an integer number (7815080).

Almost surely, 2^111145644 is an apocalyptic number.

It is an amenable number.

111145644 is an abundant number, since it is smaller than the sum of its proper divisors (170197236).

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

111145644 is a wasteful number, since it uses less digits than its factorization.

111145644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310 (or 4305 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 111145644 is about 10542.5634453865. The cubic root of 111145644 is about 480.7996566545.

Adding to 111145644 its reverse (446541111), we get a palindrome (557686755).

The spelling of 111145644 in words is "one hundred eleven million, one hundred forty-five thousand, six hundred forty-four".