3128639289616 has 45 divisors (see below), whose sum is σ = 6091479261093. Its totient is φ = 1556681983680.

The previous prime is 3128639289613. The next prime is 3128639289617. The reversal of 3128639289616 is 6169829368213.

The square root of 3128639289616 is 1768796.

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

3128639289616 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., 2913862656016 + 214776633600 = 1707004^2 + 463440^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3128639289613) 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, 1620216171 + ... + 1620218101.

Almost surely, 2^{3128639289616} is an apocalyptic number.

3128639289616 is the 1768796-th square number.

It is an amenable number.

3128639289616 is a deficient number, since it is larger than the sum of its proper divisors (2962839971477).

3128639289616 is an frugal number, since it uses more digits than its factorization.

3128639289616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328 (or 2162 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 64.

Multiplying 3128639289616 by its sum of digits (64), we get a square (200232914535424 = 14150368²).

The spelling of 3128639289616 in words is "three trillion, one hundred twenty-eight billion, six hundred thirty-nine million, two hundred eighty-nine thousand, six hundred sixteen".