320443402270489 has 9 divisors (see below), whose sum is σ = 329338786633437. Its totient is φ = 311782125343104.

The previous prime is 320443402270463. The next prime is 320443402270499. The reversal of 320443402270489 is 984072204344023.

The square root of 320443402270489 is 17900933.

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

It can be written as a sum of positive squares in 4 ways, for example, as 269333885846025 + 51109516424464 = 16411395^2 + 7149092^2 .

It is a de Polignac number, because none of the positive numbers 2^k-320443402270489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320443402270499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 662092617 + ... + 662576425.

Almost surely, 2^{320443402270489} is an apocalyptic number.

320443402270489 is the 17900933-rd square number.

320443402270489 is the 8950467-th centered octagonal number.

It is an amenable number.

320443402270489 is a deficient number, since it is larger than the sum of its proper divisors (8895384362948).

320443402270489 is an frugal number, since it uses more digits than its factorization.

320443402270489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967692 (or 483846 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 52.

The spelling of 320443402270489 in words is "three hundred twenty trillion, four hundred forty-three billion, four hundred two million, two hundred seventy thousand, four hundred eighty-nine".