85806502321 has 4 divisors (see below), whose sum is σ = 90853943652. Its totient is φ = 80759060992.

The previous prime is 85806502307. The next prime is 85806502387. The reversal of 85806502321 is 12320560858.

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 37573557921 + 48232944400 = 193839^2 + 219620^2 .

It is a cyclic number.

It is not a de Polignac number, because 85806502321 - 2¹⁷ = 85806371249 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85803502321) 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, 2523720640 + ... + 2523720673.

It is an arithmetic number, because the mean of its divisors is an integer number (22713485913).

Almost surely, 2^85806502321 is an apocalyptic number.

It is an amenable number.

85806502321 is a deficient number, since it is larger than the sum of its proper divisors (5047441331).

85806502321 is a wasteful number, since it uses less digits than its factorization.

85806502321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047441330.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 85806502321 in words is "eighty-five billion, eight hundred six million, five hundred two thousand, three hundred twenty-one".