8643008642687 has 2 divisors, whose sum is σ = 8643008642688. Its totient is φ = 8643008642686.

The previous prime is 8643008642677. The next prime is 8643008642711. The reversal of 8643008642687 is 7862468003468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8643008642687 - 2¹² = 8643008638591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8643008642627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321504321343 + 4321504321344.

It is an arithmetic number, because the mean of its divisors is an integer number (4321504321344).

Almost surely, 2^{8643008642687} is an apocalyptic number.

8643008642687 is a deficient number, since it is larger than the sum of its proper divisors (1).

8643008642687 is an equidigital number, since it uses as much as digits as its factorization.

8643008642687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74317824, while the sum is 62.

The spelling of 8643008642687 in words is "eight trillion, six hundred forty-three billion, eight million, six hundred forty-two thousand, six hundred eighty-seven".