8640238267 has 2 divisors, whose sum is σ = 8640238268. Its totient is φ = 8640238266.

The previous prime is 8640238247. The next prime is 8640238291. The reversal of 8640238267 is 7628320468.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8640238267 is a prime.

It is not a weakly prime, because it can be changed into another prime (8640238247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4320119133 + 4320119134.

It is an arithmetic number, because the mean of its divisors is an integer number (4320119134).

Almost surely, 2^8640238267 is an apocalyptic number.

8640238267 is a deficient number, since it is larger than the sum of its proper divisors (1).

8640238267 is an equidigital number, since it uses as much as digits as its factorization.

8640238267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 46.

The square root of 8640238267 is about 92952.8819725349. The cubic root of 8640238267 is about 2051.9899983775.

The spelling of 8640238267 in words is "eight billion, six hundred forty million, two hundred thirty-eight thousand, two hundred sixty-seven".