8163099865 has 24 divisors (see below), whose sum is σ = 10946602440. Its totient is φ = 5822820864.

The previous prime is 8163099817. The next prime is 8163099869. The reversal of 8163099865 is 5689903618.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3487138704 + 4675961161 = 59052^2 + 68381^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8163099865 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8163099869) 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 23 ways as a sum of consecutive naturals, for example, 102330 + ... + 163699.

It is an arithmetic number, because the mean of its divisors is an integer number (456108435).

Almost surely, 2^8163099865 is an apocalyptic number.

8163099865 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8163099865 is a deficient number, since it is larger than the sum of its proper divisors (2783502575).

8163099865 is a wasteful number, since it uses less digits than its factorization.

8163099865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266089 (or 266070 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 55.

The square root of 8163099865 is about 90349.8747370465. The cubic root of 8163099865 is about 2013.5003210367.

The spelling of 8163099865 in words is "eight billion, one hundred sixty-three million, ninety-nine thousand, eight hundred sixty-five".