6639283896 has 128 divisors (see below), whose sum is σ = 19694707200. Its totient is φ = 1824883200.

The previous prime is 6639283879. The next prime is 6639283909. The reversal of 6639283896 is 6983829366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1425171 + ... + 1429821.

It is an arithmetic number, because the mean of its divisors is an integer number (153864900).

Almost surely, 2^6639283896 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 6639283896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9847353600).

6639283896 is an abundant number, since it is smaller than the sum of its proper divisors (13055423304).

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

6639283896 is a wasteful number, since it uses less digits than its factorization.

6639283896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989 (or 4985 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 60.

The square root of 6639283896 is about 81481.8010110233. The cubic root of 6639283896 is about 1879.4917042926.

The spelling of 6639283896 in words is "six billion, six hundred thirty-nine million, two hundred eighty-three thousand, eight hundred ninety-six".