8638244643 has 24 divisors (see below), whose sum is σ = 13830297600. Its totient is φ = 4776906960.

The previous prime is 8638244609. The next prime is 8638244647. The reversal of 8638244643 is 3464428368.

8638244643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8638244643 - 2⁸ = 8638244387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8638244592 and 8638244601.

It is not an unprimeable number, because it can be changed into a prime (8638244647) 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 23 ways as a sum of consecutive naturals, for example, 943243 + ... + 952356.

It is an arithmetic number, because the mean of its divisors is an integer number (576262400).

Almost surely, 2^8638244643 is an apocalyptic number.

8638244643 is a deficient number, since it is larger than the sum of its proper divisors (5192052957).

8638244643 is a wasteful number, since it uses less digits than its factorization.

8638244643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895647 (or 1895640 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 48.

The square root of 8638244643 is about 92942.1575120784. The cubic root of 8638244643 is about 2051.8321627923.

The spelling of 8638244643 in words is "eight billion, six hundred thirty-eight million, two hundred forty-four thousand, six hundred forty-three".