2163665117 has 8 divisors (see below), whose sum is σ = 2169267576. Its totient is φ = 2158071552.

The previous prime is 2163665113. The next prime is 2163665149. The reversal of 2163665117 is 7115663612.

It can be written as a sum of positive squares in 4 ways, for example, as 30980356 + 2132684761 = 5566^2 + 46181^2 .

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 2163665117 - 2² = 2163665113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163665113) by changing a digit.

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, 820433 + ... + 823065.

It is an arithmetic number, because the mean of its divisors is an integer number (271158447).

Almost surely, 2^2163665117 is an apocalyptic number.

It is an amenable number.

2163665117 is a deficient number, since it is larger than the sum of its proper divisors (5602459).

2163665117 is an equidigital number, since it uses as much as digits as its factorization.

2163665117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4447.

The product of its digits is 45360, while the sum is 38.

The square root of 2163665117 is about 46515.2138230063. The cubic root of 2163665117 is about 1293.3915356169.

The spelling of 2163665117 in words is "two billion, one hundred sixty-three million, six hundred sixty-five thousand, one hundred seventeen".