8644481999 has 4 divisors (see below), whose sum is σ = 8685451320. Its totient is φ = 8603512680.

The previous prime is 8644481981. The next prime is 8644482001. The reversal of 8644481999 is 9991844468.

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 8644481999 - 2¹² = 8644477903 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 (8644483999) 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, 20484344 + ... + 20484765.

It is an arithmetic number, because the mean of its divisors is an integer number (2171362830).

Almost surely, 2^8644481999 is an apocalyptic number.

8644481999 is a deficient number, since it is larger than the sum of its proper divisors (40969321).

8644481999 is a wasteful number, since it uses less digits than its factorization.

8644481999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40969320.

The product of its digits is 17915904, while the sum is 62.

The square root of 8644481999 is about 92975.7064990635. The cubic root of 8644481999 is about 2052.3258946052.

The spelling of 8644481999 in words is "eight billion, six hundred forty-four million, four hundred eighty-one thousand, nine hundred ninety-nine".