3216644376 has 64 divisors (see below), whose sum is σ = 8787744000. Its totient is φ = 973065600.

The previous prime is 3216644363. The next prime is 3216644377. The reversal of 3216644376 is 6734466123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3216644377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147966 + ... + 168306.

It is an arithmetic number, because the mean of its divisors is an integer number (137308500).

Almost surely, 2^3216644376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3216644376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4393872000).

3216644376 is an abundant number, since it is smaller than the sum of its proper divisors (5571099624).

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

3216644376 is a wasteful number, since it uses less digits than its factorization.

3216644376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20960 (or 20956 counting only the distinct ones).

The product of its digits is 435456, while the sum is 42.

The square root of 3216644376 is about 56715.4685778051. The cubic root of 3216644376 is about 1476.1631160569.

The spelling of 3216644376 in words is "three billion, two hundred sixteen million, six hundred forty-four thousand, three hundred seventy-six".