117681165 has 48 divisors (see below), whose sum is σ = 236121600. Its totient is φ = 53104896.

The previous prime is 117681143. The next prime is 117681167. The reversal of 117681165 is 561186711.

117681165 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 117681165 - 2⁸ = 117680909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117681167) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22521 + ... + 27249.

It is an arithmetic number, because the mean of its divisors is an integer number (4919200).

Almost surely, 2^117681165 is an apocalyptic number.

117681165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117681165 is an abundant number, since it is smaller than the sum of its proper divisors (118440435).

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

117681165 is a wasteful number, since it uses less digits than its factorization.

117681165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826 (or 4823 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 117681165 is about 10848.0949940531. The cubic root of 117681165 is about 490.0446509359.

The spelling of 117681165 in words is "one hundred seventeen million, six hundred eighty-one thousand, one hundred sixty-five".