8591645225 has 6 divisors (see below), whose sum is σ = 10653640110. Its totient is φ = 6873316160.

The previous prime is 8591645213. The next prime is 8591645281. The reversal of 8591645225 is 5225461958.

8591645225 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 169728784 + 8421916441 = 13028^2 + 91771^2 .

It is not a de Polignac number, because 8591645225 - 2¹⁴ = 8591628841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8591645225.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171832880 + ... + 171832929.

It is an arithmetic number, because the mean of its divisors is an integer number (1775606685).

Almost surely, 2^8591645225 is an apocalyptic number.

It is an amenable number.

8591645225 is a deficient number, since it is larger than the sum of its proper divisors (2061994885).

8591645225 is a wasteful number, since it uses less digits than its factorization.

8591645225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343665819 (or 343665814 counting only the distinct ones).

The product of its digits is 864000, while the sum is 47.

The square root of 8591645225 is about 92691.1280813865. The cubic root of 8591645225 is about 2048.1359398729.

The spelling of 8591645225 in words is "eight billion, five hundred ninety-one million, six hundred forty-five thousand, two hundred twenty-five".