8205399565 has 16 divisors (see below), whose sum is σ = 11306963520. Its totient is φ = 5653480320.

The previous prime is 8205399533. The next prime is 8205399611. The reversal of 8205399565 is 5659935028.

It is not a de Polignac number, because 8205399565 - 2⁵ = 8205399533 is a prime.

It is a congruent number.

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, 3924984 + ... + 3927073.

It is an arithmetic number, because the mean of its divisors is an integer number (706685220).

Almost surely, 2^8205399565 is an apocalyptic number.

It is an amenable number.

8205399565 is a deficient number, since it is larger than the sum of its proper divisors (3101563955).

8205399565 is a wasteful number, since it uses less digits than its factorization.

8205399565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7852092.

The product of its (nonzero) digits is 2916000, while the sum is 52.

The square root of 8205399565 is about 90583.6605851188. The cubic root of 8205399565 is about 2016.9721952990.

The spelling of 8205399565 in words is "eight billion, two hundred five million, three hundred ninety-nine thousand, five hundred sixty-five".