3263999856 has 80 divisors (see below), whose sum is σ = 9138727584. Its totient is φ = 997880832.

The previous prime is 3263999801. The next prime is 3263999863. The reversal of 3263999856 is 6589993623.

It is a self number, because there is not a number n which added to its sum of digits gives 3263999856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81310 + ... + 114626.

Almost surely, 2^3263999856 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 3263999856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4569363792).

3263999856 is an abundant number, since it is smaller than the sum of its proper divisors (5874727728).

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

3263999856 is a wasteful number, since it uses less digits than its factorization.

3263999856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33498 (or 33492 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 60.

The square root of 3263999856 is about 57131.4261680907. The cubic root of 3263999856 is about 1483.3718858922.

The spelling of 3263999856 in words is "three billion, two hundred sixty-three million, nine hundred ninety-nine thousand, eight hundred fifty-six".