1809323602321 has 9 divisors (see below), whose sum is σ = 1839554314299. Its totient is φ = 1779581853000.

The previous prime is 1809323602301. The next prime is 1809323602343. The reversal of 1809323602321 is 1232063239081.

The square root of 1809323602321 is 1345111.

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

It can be written as a sum of positive squares in only one way, i.e., 58835838721 + 1750487763600 = 242561^2 + 1323060^2 .

It is not a de Polignac number, because 1809323602321 - 2²⁷ = 1809189384593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1809323602301) 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 8 ways as a sum of consecutive naturals, for example, 82040746 + ... + 82062796.

It is an arithmetic number, because the mean of its divisors is an integer number (204394923811).

Almost surely, 2^{1809323602321} is an apocalyptic number.

1809323602321 is the 1345111-st square number.

1809323602321 is the 672556-th centered octagonal number.

It is an amenable number.

1809323602321 is a deficient number, since it is larger than the sum of its proper divisors (30230711978).

1809323602321 is an frugal number, since it uses more digits than its factorization.

1809323602321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44224 (or 22112 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 1809323602321 in words is "one trillion, eight hundred nine billion, three hundred twenty-three million, six hundred two thousand, three hundred twenty-one".