8643707694 has 128 divisors (see below), whose sum is σ = 21220531200. Its totient is φ = 2598583680.

The previous prime is 8643707693. The next prime is 8643707701. The reversal of 8643707694 is 4967073468.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 8643707694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8643707693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1545984 + ... + 1551564.

It is an arithmetic number, because the mean of its divisors is an integer number (165785400).

Almost surely, 2^8643707694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8643707694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10610265600).

8643707694 is an abundant number, since it is smaller than the sum of its proper divisors (12576823506).

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

8643707694 is a wasteful number, since it uses less digits than its factorization.

8643707694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5687 (or 5681 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The square root of 8643707694 is about 92971.5423879802. The cubic root of 8643707694 is about 2052.2646156818.

The spelling of 8643707694 in words is "eight billion, six hundred forty-three million, seven hundred seven thousand, six hundred ninety-four".