3216505064 has 8 divisors (see below), whose sum is σ = 6030947010. Its totient is φ = 1608252528.

The previous prime is 3216505031. The next prime is 3216505067. The reversal of 3216505064 is 4605056123.

It can be written as a sum of positive squares in only one way, i.e., 3213756100 + 2748964 = 56690^2 + 1658^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 3216505064.

It is not an unprimeable number, because it can be changed into a prime (3216505067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201031559 + ... + 201031574.

Almost surely, 2^3216505064 is an apocalyptic number.

It is an amenable number.

3216505064 is a deficient number, since it is larger than the sum of its proper divisors (2814441946).

3216505064 is a wasteful number, since it uses less digits than its factorization.

3216505064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402063139 (or 402063135 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 3216505064 is about 56714.2403986865. The cubic root of 3216505064 is about 1476.1418050072.

The spelling of 3216505064 in words is "three billion, two hundred sixteen million, five hundred five thousand, sixty-four".