2118829985 has 8 divisors (see below), whose sum is σ = 2544354600. Its totient is φ = 1693891584.

The previous prime is 2118829967. The next prime is 2118829997. The reversal of 2118829985 is 5899288112.

It can be written as a sum of positive squares in 4 ways, for example, as 1529748544 + 589081441 = 39112^2 + 24271^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2118829985 - 2²⁶ = 2051721121 is a prime.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 138560 + ... + 153089.

It is an arithmetic number, because the mean of its divisors is an integer number (318044325).

Almost surely, 2^2118829985 is an apocalyptic number.

It is an amenable number.

2118829985 is a deficient number, since it is larger than the sum of its proper divisors (425524615).

2118829985 is a wasteful number, since it uses less digits than its factorization.

2118829985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293107.

The product of its digits is 829440, while the sum is 53.

The square root of 2118829985 is about 46030.7504283821. The cubic root of 2118829985 is about 1284.3952874452.

The spelling of 2118829985 in words is "two billion, one hundred eighteen million, eight hundred twenty-nine thousand, nine hundred eighty-five".