2163617065 has 16 divisors (see below), whose sum is σ = 2689076880. Its totient is φ = 1669212160.

The previous prime is 2163617059. The next prime is 2163617083. The reversal of 2163617065 is 5607163612.

It can be written as a sum of positive squares in 8 ways, for example, as 205377561 + 1958239504 = 14331^2 + 44252^2 .

It is not a de Polignac number, because 2163617065 - 2⁵ = 2163617033 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, 119277 + ... + 136213.

It is an arithmetic number, because the mean of its divisors is an integer number (168067305).

Almost surely, 2^2163617065 is an apocalyptic number.

It is an amenable number.

2163617065 is a deficient number, since it is larger than the sum of its proper divisors (525459815).

2163617065 is a wasteful number, since it uses less digits than its factorization.

2163617065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17852.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 2163617065 is about 46514.6973009607. The cubic root of 2163617065 is about 1293.3819607356.

The spelling of 2163617065 in words is "two billion, one hundred sixty-three million, six hundred seventeen thousand, sixty-five".