8625664559 has 4 divisors (see below), whose sum is σ = 8628319416. Its totient is φ = 8623009704.

The previous prime is 8625664547. The next prime is 8625664571. The reversal of 8625664559 is 9554665268.

8625664559 is digitally balanced in base 3, 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 an interprime number because it is at equal distance from previous prime (8625664547) and next prime (8625664571).

It is a cyclic number.

It is not a de Polignac number, because 8625664559 - 2⁸ = 8625664303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8625664589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1322549 + ... + 1329054.

It is an arithmetic number, because the mean of its divisors is an integer number (2157079854).

Almost surely, 2^8625664559 is an apocalyptic number.

8625664559 is a deficient number, since it is larger than the sum of its proper divisors (2654857).

8625664559 is a wasteful number, since it uses less digits than its factorization.

8625664559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654856.

The product of its digits is 15552000, while the sum is 56.

The square root of 8625664559 is about 92874.4559015018. The cubic root of 8625664559 is about 2050.8356346589.

The spelling of 8625664559 in words is "eight billion, six hundred twenty-five million, six hundred sixty-four thousand, five hundred fifty-nine".