6399829568 has 56 divisors (see below), whose sum is σ = 13870167840. Its totient is φ = 2905656320.

The previous prime is 6399829561. The next prime is 6399829577. The reversal of 6399829568 is 8659289936.

It is not an unprimeable number, because it can be changed into a prime (6399829561) 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 7 ways as a sum of consecutive naturals, for example, 666143 + ... + 675681.

Almost surely, 2^6399829568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6399829568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6935083920).

6399829568 is an abundant number, since it is smaller than the sum of its proper divisors (7470338272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6399829568 is a wasteful number, since it uses less digits than its factorization.

6399829568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10515 (or 10505 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 65.

The square root of 6399829568 is about 79998.9347929083. The cubic root of 6399829568 is about 1856.6190525641.

The spelling of 6399829568 in words is "six billion, three hundred ninety-nine million, eight hundred twenty-nine thousand, five hundred sixty-eight".