3221816783364 has 45 divisors (see below), whose sum is σ = 8422549942807. Its totient is φ = 1073928158136.

The previous prime is 3221816783351. The next prime is 3221816783371. The reversal of 3221816783364 is 4633876181223.

It is a happy number.

The square root of 3221816783364 is 1794942.

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

3221816783364 is a `hidden beast` number, since 3 + 2 + 218 + 1 + 67 + 8 + 3 + 364 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3221816783364.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 32259097 + ... + 32358815.

Almost surely, 2^{3221816783364} is an apocalyptic number.

3221816783364 is the 1794942-nd square number.

It is an amenable number.

3221816783364 is an abundant number, since it is smaller than the sum of its proper divisors (5200733159443).

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

3221816783364 is an frugal number, since it uses more digits than its factorization.

3221816783364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199454 (or 99724 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The spelling of 3221816783364 in words is "three trillion, two hundred twenty-one billion, eight hundred sixteen million, seven hundred eighty-three thousand, three hundred sixty-four".