8640053643 has 16 divisors (see below), whose sum is σ = 12474783776. Its totient is φ = 5287576320.

The previous prime is 8640053641. The next prime is 8640053657. The reversal of 8640053643 is 3463500468.

8640053643 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 8640053643 - 2¹ = 8640053641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (8640053641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 604930 + ... + 619047.

It is an arithmetic number, because the mean of its divisors is an integer number (779673986).

Almost surely, 2^8640053643 is an apocalyptic number.

8640053643 is a deficient number, since it is larger than the sum of its proper divisors (3834730133).

8640053643 is a wasteful number, since it uses less digits than its factorization.

8640053643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224174.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 8640053643 is about 92951.8888619268. Note that the first 4 decimals coincide. The cubic root of 8640053643 is about 2051.9753826810.

The spelling of 8640053643 in words is "eight billion, six hundred forty million, fifty-three thousand, six hundred forty-three".