111780816 has 80 divisors (see below), whose sum is σ = 336299904. Its totient is φ = 31329792.

The previous prime is 111780803. The next prime is 111780817. The reversal of 111780816 is 618087111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111780817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14670 + ... + 20946.

Almost surely, 2^111780816 is an apocalyptic number.

111780816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111780816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168149952).

111780816 is an abundant number, since it is smaller than the sum of its proper divisors (224519088).

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

111780816 is a wasteful number, since it uses less digits than its factorization.

111780816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6348 (or 6342 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 33.

The square root of 111780816 is about 10572.6447022493. The cubic root of 111780816 is about 481.7138042625.

The spelling of 111780816 in words is "one hundred eleven million, seven hundred eighty thousand, eight hundred sixteen".