85865728565 has 8 divisors (see below), whose sum is σ = 105231191040. Its totient is φ = 67231038352.

The previous prime is 85865728537. The next prime is 85865728567. The reversal of 85865728565 is 56582756858.

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 85865728565 - 2¹⁶ = 85865663029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85865728567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182692805 + ... + 182693274.

It is an arithmetic number, because the mean of its divisors is an integer number (13153898880).

Almost surely, 2^85865728565 is an apocalyptic number.

It is an amenable number.

85865728565 is a deficient number, since it is larger than the sum of its proper divisors (19365462475).

85865728565 is a wasteful number, since it uses less digits than its factorization.

85865728565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365386131.

The product of its digits is 161280000, while the sum is 65.

The spelling of 85865728565 in words is "eighty-five billion, eight hundred sixty-five million, seven hundred twenty-eight thousand, five hundred sixty-five".