117717381845 has 16 divisors (see below), whose sum is σ = 164087557248. Its totient is φ = 79397202240.

The previous prime is 117717381797. The next prime is 117717381877. The reversal of 117717381845 is 548183717711.

It is a happy number.

It is not a de Polignac number, because 117717381845 - 2⁶ = 117717381781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27566339 + ... + 27570608.

It is an arithmetic number, because the mean of its divisors is an integer number (10255472328).

Almost surely, 2^117717381845 is an apocalyptic number.

It is an amenable number.

117717381845 is a deficient number, since it is larger than the sum of its proper divisors (46370175403).

117717381845 is an equidigital number, since it uses as much as digits as its factorization.

117717381845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55137020.

The product of its digits is 1317120, while the sum is 53.

The spelling of 117717381845 in words is "one hundred seventeen billion, seven hundred seventeen million, three hundred eighty-one thousand, eight hundred forty-five".