3216704656 has 45 divisors (see below), whose sum is σ = 6855769753. Its totient is φ = 1461004160.

The previous prime is 3216704653. The next prime is 3216704713. The reversal of 3216704656 is 6564076123.

The square root of 3216704656 is 56716.

It is a perfect power (a square), and thus also a powerful number.

3216704656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2609575056 + 607129600 = 51084^2 + 24640^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3216704653) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2494860 + ... + 2496148.

Almost surely, 2^3216704656 is an apocalyptic number.

3216704656 is the 56716-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3216704656

3216704656 is an abundant number, since it is smaller than the sum of its proper divisors (3639065097).

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

3216704656 is an equidigital number, since it uses as much as digits as its factorization.

3216704656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608 (or 1302 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The cubic root of 3216704656 is about 1476.1723371112.

The spelling of 3216704656 in words is "three billion, two hundred sixteen million, seven hundred four thousand, six hundred fifty-six".