6421736829 has 16 divisors (see below), whose sum is σ = 8906526720. Its totient is φ = 4110684480.

The previous prime is 6421736801. The next prime is 6421736843. The reversal of 6421736829 is 9286371246.

It is not a de Polignac number, because 6421736829 - 2⁷ = 6421736701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421736029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188157 + ... + 219650.

It is an arithmetic number, because the mean of its divisors is an integer number (556657920).

Almost surely, 2^6421736829 is an apocalyptic number.

It is an amenable number.

6421736829 is a deficient number, since it is larger than the sum of its proper divisors (2484789891).

6421736829 is a wasteful number, since it uses less digits than its factorization.

6421736829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408020.

The product of its digits is 870912, while the sum is 48.

The square root of 6421736829 is about 80135.7400227888. The cubic root of 6421736829 is about 1858.7351045636.

The spelling of 6421736829 in words is "six billion, four hundred twenty-one million, seven hundred thirty-six thousand, eight hundred twenty-nine".