320218388073 has 40 divisors (see below), whose sum is σ = 520178195592. Its totient is φ = 195491003904.

The previous prime is 320218388027. The next prime is 320218388101. The reversal of 320218388073 is 370883812023.

320218388073 is a `hidden beast` number, since 320 + 2 + 183 + 8 + 80 + 73 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 262504571904 + 57713816169 = 512352^2 + 240237^2 .

It is not a de Polignac number, because 320218388073 - 2⁹ = 320218387561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320218388003) 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 39 ways as a sum of consecutive naturals, for example, 3091590 + ... + 3193487.

Almost surely, 2^320218388073 is an apocalyptic number.

It is an amenable number.

320218388073 is a deficient number, since it is larger than the sum of its proper divisors (199959807519).

320218388073 is a wasteful number, since it uses less digits than its factorization.

320218388073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6285143 (or 6285134 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 320218388073 in words is "three hundred twenty billion, two hundred eighteen million, three hundred eighty-eight thousand, seventy-three".