111640806 has 24 divisors (see below), whose sum is σ = 242507304. Its totient is φ = 37118400.

The previous prime is 111640801. The next prime is 111640811. The reversal of 111640806 is 608046111.

111640806 is a `hidden beast` number, since 1 + 11 + 640 + 8 + 0 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (111640801) and next prime (111640811).

It is a self number, because there is not a number n which added to its sum of digits gives 111640806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111640801) 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 11 ways as a sum of consecutive naturals, for example, 516 + ... + 14951.

It is an arithmetic number, because the mean of its divisors is an integer number (10104471).

Almost surely, 2^111640806 is an apocalyptic number.

111640806 is an abundant number, since it is smaller than the sum of its proper divisors (130866498).

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

111640806 is a wasteful number, since it uses less digits than its factorization.

111640806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15876 (or 15873 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 111640806 is about 10566.0212946975. The cubic root of 111640806 is about 481.5125982153.

Adding to 111640806 its reverse (608046111), we get a palindrome (719686917).

The spelling of 111640806 in words is "one hundred eleven million, six hundred forty thousand, eight hundred six".