3216639361 has 6 divisors (see below), whose sum is σ = 3483106710. Its totient is φ = 2969205408.

The previous prime is 3216639359. The next prime is 3216639367. The reversal of 3216639361 is 1639366123.

3216639361 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 3 ways, for example, as 40640625 + 3175998736 = 6375^2 + 56356^2 .

It is not a de Polignac number, because 3216639361 - 2¹ = 3216639359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3216639367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9516516 + ... + 9516853.

It is an arithmetic number, because the mean of its divisors is an integer number (580517785).

Almost surely, 2^3216639361 is an apocalyptic number.

It is an amenable number.

3216639361 is a deficient number, since it is larger than the sum of its proper divisors (266467349).

3216639361 is a wasteful number, since it uses less digits than its factorization.

3216639361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19033395 (or 19033382 counting only the distinct ones).

The product of its digits is 104976, while the sum is 40.

The square root of 3216639361 is about 56715.4243658636. The cubic root of 3216639361 is about 1476.1623489053.

The spelling of 3216639361 in words is "three billion, two hundred sixteen million, six hundred thirty-nine thousand, three hundred sixty-one".