8716638644 has 24 divisors (see below), whose sum is σ = 17502746688. Its totient is φ = 3720816000.

The previous prime is 8716638631. The next prime is 8716638677. The reversal of 8716638644 is 4468366178.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613109 + ... + 627164.

It is an arithmetic number, because the mean of its divisors is an integer number (729281112).

Almost surely, 2^8716638644 is an apocalyptic number.

It is an amenable number.

8716638644 is an abundant number, since it is smaller than the sum of its proper divisors (8786108044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8716638644 is a wasteful number, since it uses less digits than its factorization.

8716638644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240535 (or 1240533 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 53.

The square root of 8716638644 is about 93362.9404207044. The cubic root of 8716638644 is about 2058.0204255899.

The spelling of 8716638644 in words is "eight billion, seven hundred sixteen million, six hundred thirty-eight thousand, six hundred forty-four".