8585721573 has 32 divisors (see below), whose sum is σ = 13812473472. Its totient is φ = 4673376000.

The previous prime is 8585721517. The next prime is 8585721593. The reversal of 8585721573 is 3751275858.

It is not a de Polignac number, because 8585721573 - 2²⁰ = 8584672997 is a prime.

It is a super-2 number, since 2×8585721573² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8585721593) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254578 + ... + 286323.

It is an arithmetic number, because the mean of its divisors is an integer number (431639796).

Almost surely, 2^8585721573 is an apocalyptic number.

It is an amenable number.

8585721573 is a deficient number, since it is larger than the sum of its proper divisors (5226751899).

8585721573 is a wasteful number, since it uses less digits than its factorization.

8585721573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540965.

The product of its digits is 2352000, while the sum is 51.

The square root of 8585721573 is about 92659.1688555428. The cubic root of 8585721573 is about 2047.6651245785.

The spelling of 8585721573 in words is "eight billion, five hundred eighty-five million, seven hundred twenty-one thousand, five hundred seventy-three".