2165842863 has 24 divisors (see below), whose sum is σ = 3293383392. Its totient is φ = 1368880128.

The previous prime is 2165842853. The next prime is 2165842997. The reversal of 2165842863 is 3682485612.

2165842863 is a `hidden beast` number, since 2 + 1 + 6 + 584 + 2 + 8 + 63 = 666.

It is not a de Polignac number, because 2165842863 - 2⁸ = 2165842607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165842853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22906 + ... + 69687.

It is an arithmetic number, because the mean of its divisors is an integer number (137224308).

Almost surely, 2^2165842863 is an apocalyptic number.

2165842863 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2165842863 is a deficient number, since it is larger than the sum of its proper divisors (1127540529).

2165842863 is a wasteful number, since it uses less digits than its factorization.

2165842863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92735 (or 92732 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 2165842863 is about 46538.6169003764. The cubic root of 2165842863 is about 1293.8253263710.

The spelling of 2165842863 in words is "two billion, one hundred sixty-five million, eight hundred forty-two thousand, eight hundred sixty-three".