320504163373 has 2 divisors, whose sum is σ = 320504163374. Its totient is φ = 320504163372.

The previous prime is 320504163341. The next prime is 320504163403. The reversal of 320504163373 is 373361405023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194307284809 + 126196878564 = 440803^2 + 355242^2 .

It is a cyclic number.

It is not a de Polignac number, because 320504163373 - 2⁵ = 320504163341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320504163313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160252081686 + 160252081687.

It is an arithmetic number, because the mean of its divisors is an integer number (160252081687).

Almost surely, 2^320504163373 is an apocalyptic number.

It is an amenable number.

320504163373 is a deficient number, since it is larger than the sum of its proper divisors (1).

320504163373 is an equidigital number, since it uses as much as digits as its factorization.

320504163373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 37.

Adding to 320504163373 its reverse (373361405023), we get a palindrome (693865568396).

The spelling of 320504163373 in words is "three hundred twenty billion, five hundred four million, one hundred sixty-three thousand, three hundred seventy-three".