118218732185 has 4 divisors (see below), whose sum is σ = 141862478628. Its totient is φ = 94574985744.

The previous prime is 118218732179. The next prime is 118218732187. The reversal of 118218732185 is 581237812811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 581237812811 = 78929 ⋅7364059.

It can be written as a sum of positive squares in 2 ways, for example, as 76312957504 + 41905774681 = 276248^2 + 204709^2 .

It is a cyclic number.

It is not a de Polignac number, because 118218732185 - 2⁴ = 118218732169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118218732187) 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, 11821873214 + ... + 11821873223.

It is an arithmetic number, because the mean of its divisors is an integer number (35465619657).

Almost surely, 2^118218732185 is an apocalyptic number.

It is an amenable number.

118218732185 is a deficient number, since it is larger than the sum of its proper divisors (23643746443).

118218732185 is an equidigital number, since it uses as much as digits as its factorization.

118218732185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23643746442.

The product of its digits is 215040, while the sum is 47.

The spelling of 118218732185 in words is "one hundred eighteen billion, two hundred eighteen million, seven hundred thirty-two thousand, one hundred eighty-five".