8728643579443 has 4 divisors (see below), whose sum is σ = 8728863711480. Its totient is φ = 8728423447408.

The previous prime is 8728643579431. The next prime is 8728643579479. The reversal of 8728643579443 is 3449753468278.

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

It is a cyclic number.

It is not a de Polignac number, because 8728643579443 - 2¹³ = 8728643571251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8728643579143) 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, 110006530 + ... + 110085847.

It is an arithmetic number, because the mean of its divisors is an integer number (2182215927870).

Almost surely, 2^{8728643579443} is an apocalyptic number.

8728643579443 is a deficient number, since it is larger than the sum of its proper divisors (220132037).

8728643579443 is a wasteful number, since it uses less digits than its factorization.

8728643579443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220132036.

The product of its digits is 975421440, while the sum is 70.

The spelling of 8728643579443 in words is "eight trillion, seven hundred twenty-eight billion, six hundred forty-three million, five hundred seventy-nine thousand, four hundred forty-three".