6818875643 has 4 divisors (see below), whose sum is σ = 6947533728. Its totient is φ = 6690217560.

The previous prime is 6818875607. The next prime is 6818875663. The reversal of 6818875643 is 3465788186.

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

It is not a de Polignac number, because 6818875643 - 2¹⁰ = 6818874619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6818875603) 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, 64328963 + ... + 64329068.

It is an arithmetic number, because the mean of its divisors is an integer number (1736883432).

Almost surely, 2^6818875643 is an apocalyptic number.

6818875643 is a deficient number, since it is larger than the sum of its proper divisors (128658085).

6818875643 is a wasteful number, since it uses less digits than its factorization.

6818875643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128658084.

The product of its digits is 7741440, while the sum is 56.

The square root of 6818875643 is about 82576.4835955128. The cubic root of 6818875643 is about 1896.2878251871.

The spelling of 6818875643 in words is "six billion, eight hundred eighteen million, eight hundred seventy-five thousand, six hundred forty-three".