8573459781 has 16 divisors (see below), whose sum is σ = 11669471360. Its totient is φ = 5597363520.

The previous prime is 8573459779. The next prime is 8573459827. The reversal of 8573459781 is 1879543758.

It is a happy number.

It is not a de Polignac number, because 8573459781 - 2¹ = 8573459779 is a prime.

It is a super-2 number, since 2×8573459781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8573459711) 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, 60385 + ... + 144198.

It is an arithmetic number, because the mean of its divisors is an integer number (729341960).

Almost surely, 2^8573459781 is an apocalyptic number.

It is an amenable number.

8573459781 is a deficient number, since it is larger than the sum of its proper divisors (3096011579).

8573459781 is a wasteful number, since it uses less digits than its factorization.

8573459781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204876.

The product of its digits is 8467200, while the sum is 57.

The square root of 8573459781 is about 92592.9791128895. The cubic root of 8573459781 is about 2046.6898617192.

The spelling of 8573459781 in words is "eight billion, five hundred seventy-three million, four hundred fifty-nine thousand, seven hundred eighty-one".