320645305323 has 32 divisors (see below), whose sum is σ = 556132792320. Its totient is φ = 178756960320.

The previous prime is 320645305303. The next prime is 320645305349. The reversal of 320645305323 is 323503546023.

320645305323 is a `hidden beast` number, since 3 + 2 + 0 + 645 + 3 + 0 + 5 + 3 + 2 + 3 = 666.

It is not a de Polignac number, because 320645305323 - 2¹⁶ = 320645239787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320645305303) 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 31 ways as a sum of consecutive naturals, for example, 20681715 + ... + 20697212.

It is an arithmetic number, because the mean of its divisors is an integer number (17379149760).

Almost surely, 2^320645305323 is an apocalyptic number.

320645305323 is a deficient number, since it is larger than the sum of its proper divisors (235487486997).

320645305323 is a wasteful number, since it uses less digits than its factorization.

320645305323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41378984 (or 41378978 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 36.

The spelling of 320645305323 in words is "three hundred twenty billion, six hundred forty-five million, three hundred five thousand, three hundred twenty-three".