320289665522 has 18 divisors (see below), whose sum is σ = 484083870543. Its totient is φ = 158937486684.

The previous prime is 320289665497. The next prime is 320289665533. The reversal of 320289665522 is 225566982023.

It can be written as a sum of positive squares in only one way, i.e., 160144832761 + 160144832761 = 400181^2 + 400181^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=400181.

It is a Duffinian number.

It is an unprimeable number.

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, 111248879 + ... + 111251757.

Almost surely, 2^320289665522 is an apocalyptic number.

320289665522 is a deficient number, since it is larger than the sum of its proper divisors (163794205021).

320289665522 is an frugal number, since it uses more digits than its factorization.

320289665522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6038 (or 3020 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 50.

Multiplying 320289665522 by its sum of digits (50), we get a square (16014483276100 = 4001810²).

The spelling of 320289665522 in words is "three hundred twenty billion, two hundred eighty-nine million, six hundred sixty-five thousand, five hundred twenty-two".