8218805459 has 4 divisors (see below), whose sum is σ = 8218998600. Its totient is φ = 8218612320.

The previous prime is 8218805443. The next prime is 8218805461. The reversal of 8218805459 is 9545088128.

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

It is a cyclic number.

It is not a de Polignac number, because 8218805459 - 2⁴ = 8218805443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8218805479) 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, 1622 + ... + 128219.

It is an arithmetic number, because the mean of its divisors is an integer number (2054749650).

Almost surely, 2^8218805459 is an apocalyptic number.

8218805459 is a deficient number, since it is larger than the sum of its proper divisors (193141).

8218805459 is a wasteful number, since it uses less digits than its factorization.

8218805459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193140.

The product of its (nonzero) digits is 921600, while the sum is 50.

The square root of 8218805459 is about 90657.6276934269. The cubic root of 8218805459 is about 2018.0700334998.

The spelling of 8218805459 in words is "eight billion, two hundred eighteen million, eight hundred five thousand, four hundred fifty-nine".