8643008642943 has 4 divisors (see below), whose sum is σ = 11524011523928. Its totient is φ = 5762005761960.

The previous prime is 8643008642929. The next prime is 8643008642963. The reversal of 8643008642943 is 3492468003468.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8643008642943 - 2⁸ = 8643008642687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8643008642963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440501440488 + ... + 1440501440493.

It is an arithmetic number, because the mean of its divisors is an integer number (2881002880982).

Almost surely, 2^{8643008642943} is an apocalyptic number.

8643008642943 is a deficient number, since it is larger than the sum of its proper divisors (2881002880985).

8643008642943 is a wasteful number, since it uses less digits than its factorization.

8643008642943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881002880984.

The product of its (nonzero) digits is 23887872, while the sum is 57.

The spelling of 8643008642943 in words is "eight trillion, six hundred forty-three billion, eight million, six hundred forty-two thousand, nine hundred forty-three".