3215609856 has 156 divisors (see below), whose sum is σ = 9779398720. Its totient is φ = 1015234560.

The previous prime is 3215609851. The next prime is 3215609893. The reversal of 3215609856 is 6589065123.

3215609856 is a `hidden beast` number, since 3 + 2 + 1 + 560 + 9 + 85 + 6 = 666.

It is a super-3 number, since 3×3215609856³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3215609851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 698121 + ... + 702711.

Almost surely, 2^3215609856 is an apocalyptic number.

3215609856 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3215609856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4889699360).

3215609856 is an abundant number, since it is smaller than the sum of its proper divisors (6563788864).

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

3215609856 is a wasteful number, since it uses less digits than its factorization.

3215609856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4640 (or 4615 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 3215609856 is about 56706.3475812012. The cubic root of 3215609856 is about 1476.0048471870.

The spelling of 3215609856 in words is "three billion, two hundred fifteen million, six hundred nine thousand, eight hundred fifty-six".