108018819985 has 4 divisors (see below), whose sum is σ = 129622583988. Its totient is φ = 86415055984.

The previous prime is 108018819973. The next prime is 108018819991. The reversal of 108018819985 is 589918810801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589918810801 = 79 ⋅7467326719.

It can be written as a sum of positive squares in 2 ways, for example, as 12092961024 + 95925858961 = 109968^2 + 309719^2 .

It is a cyclic number.

It is not a de Polignac number, because 108018819985 - 2¹¹ = 108018817937 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 10801881994 + ... + 10801882003.

It is an arithmetic number, because the mean of its divisors is an integer number (32405645997).

Almost surely, 2^108018819985 is an apocalyptic number.

It is an amenable number.

108018819985 is a deficient number, since it is larger than the sum of its proper divisors (21603764003).

108018819985 is an equidigital number, since it uses as much as digits as its factorization.

108018819985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21603764002.

The product of its (nonzero) digits is 1658880, while the sum is 58.

The spelling of 108018819985 in words is "one hundred eight billion, eighteen million, eight hundred nineteen thousand, nine hundred eighty-five".