85864285873 has 4 divisors (see below), whose sum is σ = 86829053220. Its totient is φ = 84899518528.

The previous prime is 85864285813. The next prime is 85864285877. The reversal of 85864285873 is 37858246858.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38372108544 + 47492177329 = 195888^2 + 217927^2 .

It is a cyclic number.

It is not a de Polignac number, because 85864285873 - 2²¹ = 85862188721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85864285877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482383540 + ... + 482383717.

It is an arithmetic number, because the mean of its divisors is an integer number (21707263305).

Almost surely, 2^85864285873 is an apocalyptic number.

It is an amenable number.

85864285873 is a deficient number, since it is larger than the sum of its proper divisors (964767347).

85864285873 is an equidigital number, since it uses as much as digits as its factorization.

85864285873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964767346.

The product of its digits is 103219200, while the sum is 64.

The spelling of 85864285873 in words is "eighty-five billion, eight hundred sixty-four million, two hundred eighty-five thousand, eight hundred seventy-three".