321664448804 has 12 divisors (see below), whose sum is σ = 563774831004. Its totient is φ = 160585925664.

The previous prime is 321664448803. The next prime is 321664448813. The reversal of 321664448804 is 408844466123.

It can be written as a sum of positive squares in 2 ways, for example, as 90813027904 + 230851420900 = 301352^2 + 480470^2 .

It is a super-2 number, since 2×321664448804² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (321664448803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61571747 + ... + 61576970.

It is an arithmetic number, because the mean of its divisors is an integer number (46981235917).

Almost surely, 2^321664448804 is an apocalyptic number.

It is an amenable number.

321664448804 is a deficient number, since it is larger than the sum of its proper divisors (242110382200).

321664448804 is a wasteful number, since it uses less digits than its factorization.

321664448804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123149374 (or 123149372 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 50.

The spelling of 321664448804 in words is "three hundred twenty-one billion, six hundred sixty-four million, four hundred forty-eight thousand, eight hundred four".