2085646065 has 16 divisors (see below), whose sum is σ = 3341437056. Its totient is φ = 1110876800.

The previous prime is 2085646051. The next prime is 2085646091. The reversal of 2085646065 is 5606465802.

It is not a de Polignac number, because 2085646065 - 2¹¹ = 2085644017 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 15 ways as a sum of consecutive naturals, for example, 79941 + ... + 102770.

It is an arithmetic number, because the mean of its divisors is an integer number (208839816).

Almost surely, 2^2085646065 is an apocalyptic number.

It is an amenable number.

2085646065 is a deficient number, since it is larger than the sum of its proper divisors (1255790991).

2085646065 is a wasteful number, since it uses less digits than its factorization.

2085646065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183480.

The product of its (nonzero) digits is 345600, while the sum is 42.

The square root of 2085646065 is about 45668.8741376443. The cubic root of 2085646065 is about 1277.6548173733.

The spelling of 2085646065 in words is "two billion, eighty-five million, six hundred forty-six thousand, sixty-five".