8645238566 has 4 divisors (see below), whose sum is σ = 12967857852. Its totient is φ = 4322619282.

The previous prime is 8645238541. The next prime is 8645238571. The reversal of 8645238566 is 6658325468.

8645238566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2161309640 + ... + 2161309643.

It is an arithmetic number, because the mean of its divisors is an integer number (3241964463).

Almost surely, 2^8645238566 is an apocalyptic number.

8645238566 is a deficient number, since it is larger than the sum of its proper divisors (4322619286).

8645238566 is a wasteful number, since it uses less digits than its factorization.

8645238566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4322619285.

The product of its digits is 8294400, while the sum is 53.

The square root of 8645238566 is about 92979.7750373704. The cubic root of 8645238566 is about 2052.3857661992.

The spelling of 8645238566 in words is "eight billion, six hundred forty-five million, two hundred thirty-eight thousand, five hundred sixty-six".