3216684365 has 4 divisors (see below), whose sum is σ = 3860021244. Its totient is φ = 2573347488.

The previous prime is 3216684347. The next prime is 3216684377. The reversal of 3216684365 is 5634866123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5634866123 = 37 ⋅152293679.

It can be written as a sum of positive squares in 2 ways, for example, as 529506121 + 2687178244 = 23011^2 + 51838^2 .

It is a cyclic number.

It is not a de Polignac number, because 3216684365 - 2⁶ = 3216684301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321668432 + ... + 321668441.

It is an arithmetic number, because the mean of its divisors is an integer number (965005311).

Almost surely, 2^3216684365 is an apocalyptic number.

It is an amenable number.

3216684365 is a deficient number, since it is larger than the sum of its proper divisors (643336879).

3216684365 is an equidigital number, since it uses as much as digits as its factorization.

3216684365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643336878.

The product of its digits is 622080, while the sum is 44.

The square root of 3216684365 is about 56715.8211172156. The cubic root of 3216684365 is about 1476.1692332021.

The spelling of 3216684365 in words is "three billion, two hundred sixteen million, six hundred eighty-four thousand, three hundred sixty-five".