8625664589 has 2 divisors, whose sum is σ = 8625664590. Its totient is φ = 8625664588.

The previous prime is 8625664573. The next prime is 8625664591. The reversal of 8625664589 is 9854665268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8341168900 + 284495689 = 91330^2 + 16867^2 .

It is a cyclic number.

It is not a de Polignac number, because 8625664589 - 2⁴ = 8625664573 is a prime.

Together with 8625664591, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8625664189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4312832294 + 4312832295.

It is an arithmetic number, because the mean of its divisors is an integer number (4312832295).

Almost surely, 2^8625664589 is an apocalyptic number.

It is an amenable number.

8625664589 is a deficient number, since it is larger than the sum of its proper divisors (1).

8625664589 is an equidigital number, since it uses as much as digits as its factorization.

8625664589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24883200, while the sum is 59.

The square root of 8625664589 is about 92874.4560630101. The cubic root of 8625664589 is about 2050.8356370365.

The spelling of 8625664589 in words is "eight billion, six hundred twenty-five million, six hundred sixty-four thousand, five hundred eighty-nine".