8641563841 has 16 divisors (see below), whose sum is σ = 9275656320. Its totient is φ = 8032273920.

The previous prime is 8641563829. The next prime is 8641563859. The reversal of 8641563841 is 1483651468.

8641563841 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 8641563841 - 2⁷ = 8641563713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8641563791 and 8641563800.

It is not an unprimeable number, because it can be changed into a prime (8641563871) 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 15 ways as a sum of consecutive naturals, for example, 79345 + ... + 153553.

It is an arithmetic number, because the mean of its divisors is an integer number (579728520).

Almost surely, 2^8641563841 is an apocalyptic number.

It is an amenable number.

8641563841 is a deficient number, since it is larger than the sum of its proper divisors (634092479).

8641563841 is a wasteful number, since it uses less digits than its factorization.

8641563841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74376.

The product of its digits is 552960, while the sum is 46.

The square root of 8641563841 is about 92960.0120535706. The cubic root of 8641563841 is about 2052.0949308811.

The spelling of 8641563841 in words is "eight billion, six hundred forty-one million, five hundred sixty-three thousand, eight hundred forty-one".