2081589985 has 16 divisors (see below), whose sum is σ = 2587309200. Its totient is φ = 1605816576.

The previous prime is 2081589971. The next prime is 2081589997. The reversal of 2081589985 is 5899851802.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 61716736 + 2019873249 = 7856^2 + 44943^2 .

It is a cyclic number.

It is not a de Polignac number, because 2081589985 - 2¹⁹ = 2081065697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111547 + ... + 128863.

It is an arithmetic number, because the mean of its divisors is an integer number (161706825).

Almost surely, 2^2081589985 is an apocalyptic number.

It is an amenable number.

2081589985 is a deficient number, since it is larger than the sum of its proper divisors (505719215).

2081589985 is a wasteful number, since it uses less digits than its factorization.

2081589985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18180.

The product of its (nonzero) digits is 2073600, while the sum is 55.

The square root of 2081589985 is about 45624.4450377207. The cubic root of 2081589985 is about 1276.8260360992.

The spelling of 2081589985 in words is "two billion, eighty-one million, five hundred eighty-nine thousand, nine hundred eighty-five".