6839642643 has 16 divisors (see below), whose sum is σ = 9223583136. Its totient is φ = 4507937280.

The previous prime is 6839642627. The next prime is 6839642669. The reversal of 6839642643 is 3462469386.

It is not a de Polignac number, because 6839642643 - 2⁴ = 6839642627 is a prime.

It is a super-2 number, since 2×6839642643² = 93561422967888050898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6839647643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109173 + ... + 159993.

It is an arithmetic number, because the mean of its divisors is an integer number (576473946).

Almost surely, 2^6839642643 is an apocalyptic number.

6839642643 is a deficient number, since it is larger than the sum of its proper divisors (2383940493).

6839642643 is a wasteful number, since it uses less digits than its factorization.

6839642643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51334.

The product of its digits is 4478976, while the sum is 51.

The square root of 6839642643 is about 82702.1320341864. The cubic root of 6839642643 is about 1898.2109330000.

The spelling of 6839642643 in words is "six billion, eight hundred thirty-nine million, six hundred forty-two thousand, six hundred forty-three".