85569565 has 8 divisors (see below), whose sum is σ = 102979800. Its totient is φ = 68258112.

The previous prime is 85569509. The next prime is 85569577. The reversal of 85569565 is 56596558.

It can be written as a sum of positive squares in 4 ways, for example, as 41718681 + 43850884 = 6459^2 + 6622^2 .

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 85569565 - 2¹⁵ = 85536797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22774 + ... + 26263.

It is an arithmetic number, because the mean of its divisors is an integer number (12872475).

Almost surely, 2^85569565 is an apocalyptic number.

It is an amenable number.

85569565 is a deficient number, since it is larger than the sum of its proper divisors (17410235).

85569565 is a wasteful number, since it uses less digits than its factorization.

85569565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49391.

The product of its digits is 1620000, while the sum is 49.

The square root of 85569565 is about 9250.3818840089. The cubic root of 85569565 is about 440.6628525066.

The spelling of 85569565 in words is "eighty-five million, five hundred sixty-nine thousand, five hundred sixty-five".