117565812 has 144 divisors (see below), whose sum is σ = 387459072. Its totient is φ = 29168640.

The previous prime is 117565801. The next prime is 117565813. The reversal of 117565812 is 218565711.

117565812 is a `hidden beast` number, since 1 + 1 + 75 + 6 + 581 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117565813) 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 47 ways as a sum of consecutive naturals, for example, 54637 + ... + 56747.

It is an arithmetic number, because the mean of its divisors is an integer number (2690688).

Almost surely, 2^117565812 is an apocalyptic number.

117565812 is a gapful number since it is divisible by the number (12) 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 117565812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193729536).

117565812 is an abundant number, since it is smaller than the sum of its proper divisors (269893260).

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

117565812 is a wasteful number, since it uses less digits than its factorization.

117565812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158 (or 2153 counting only the distinct ones).

The product of its digits is 16800, while the sum is 36.

The square root of 117565812 is about 10842.7769505787. The cubic root of 117565812 is about 489.8844820009.

The spelling of 117565812 in words is "one hundred seventeen million, five hundred sixty-five thousand, eight hundred twelve".