82569565 has 8 divisors (see below), whose sum is σ = 106705368. Its totient is φ = 60974400.

The previous prime is 82569551. The next prime is 82569569. The reversal of 82569565 is 56596528.

It can be written as a sum of positive squares in 4 ways, for example, as 7001316 + 75568249 = 2646^2 + 8693^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82569565 - 2⁷ = 82569437 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 (82569569) 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, 635086 + ... + 635215.

It is an arithmetic number, because the mean of its divisors is an integer number (13338171).

Almost surely, 2^82569565 is an apocalyptic number.

It is an amenable number.

82569565 is a deficient number, since it is larger than the sum of its proper divisors (24135803).

82569565 is a wasteful number, since it uses less digits than its factorization.

82569565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270319.

The product of its digits is 648000, while the sum is 46.

The square root of 82569565 is about 9086.7796825938. The cubic root of 82569565 is about 435.4517085214.

The spelling of 82569565 in words is "eighty-two million, five hundred sixty-nine thousand, five hundred sixty-five".