85573865 has 16 divisors (see below), whose sum is σ = 111090000. Its totient is φ = 62906112.

The previous prime is 85573861. The next prime is 85573871. The reversal of 85573865 is 56837558.

It can be written as a sum of positive squares in 8 ways, for example, as 9168784 + 76405081 = 3028^2 + 8741^2 .

It is a cyclic number.

It is not a de Polignac number, because 85573865 - 2² = 85573861 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (85573861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12011 + ... + 17759.

It is an arithmetic number, because the mean of its divisors is an integer number (6943125).

Almost surely, 2^85573865 is an apocalyptic number.

It is an amenable number.

85573865 is a deficient number, since it is larger than the sum of its proper divisors (25516135).

85573865 is a wasteful number, since it uses less digits than its factorization.

85573865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996.

The product of its digits is 1008000, while the sum is 47.

The square root of 85573865 is about 9250.6143039260. The cubic root of 85573865 is about 440.6702337078.

The spelling of 85573865 in words is "eighty-five million, five hundred seventy-three thousand, eight hundred sixty-five".