117815668 has 12 divisors (see below), whose sum is σ = 206476452. Its totient is φ = 58822400.

The previous prime is 117815651. The next prime is 117815669. The reversal of 117815668 is 866518711.

It can be written as a sum of positive squares in 2 ways, for example, as 58186384 + 59629284 = 7628^2 + 7722^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117815669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18205 + ... + 23812.

It is an arithmetic number, because the mean of its divisors is an integer number (17206371).

Almost surely, 2^117815668 is an apocalyptic number.

It is an amenable number.

117815668 is a deficient number, since it is larger than the sum of its proper divisors (88660784).

117815668 is a wasteful number, since it uses less digits than its factorization.

117815668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42722 (or 42720 counting only the distinct ones).

The product of its digits is 80640, while the sum is 43.

The square root of 117815668 is about 10854.2926070749. The cubic root of 117815668 is about 490.2312777429.

The spelling of 117815668 in words is "one hundred seventeen million, eight hundred fifteen thousand, six hundred sixty-eight".