111775816 has 64 divisors (see below), whose sum is σ = 231260400. Its totient is φ = 50429952.

The previous prime is 111775813. The next prime is 111775849. The reversal of 111775816 is 618577111.

It can be written as a sum of positive squares in 8 ways, for example, as 108368100 + 3407716 = 10410^2 + 1846^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (111775813) 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, 487990 + ... + 488218.

Almost surely, 2^111775816 is an apocalyptic number.

It is an amenable number.

111775816 is an abundant number, since it is smaller than the sum of its proper divisors (119484584).

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

111775816 is a wasteful number, since it uses less digits than its factorization.

111775816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 382 counting only the distinct ones).

The product of its digits is 11760, while the sum is 37.

The square root of 111775816 is about 10572.4082403207. The cubic root of 111775816 is about 481.7066217393.

The spelling of 111775816 in words is "one hundred eleven million, seven hundred seventy-five thousand, eight hundred sixteen".