320420130445 has 4 divisors (see below), whose sum is σ = 384504156540. Its totient is φ = 256336104352.

The previous prime is 320420130397. The next prime is 320420130461. The reversal of 320420130445 is 544031024023.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 249437316969 + 70982813476 = 499437^2 + 266426^2 .

It is a cyclic number.

It is not a de Polignac number, because 320420130445 - 2¹⁵ = 320420097677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32042013040 + ... + 32042013049.

It is an arithmetic number, because the mean of its divisors is an integer number (96126039135).

Almost surely, 2^320420130445 is an apocalyptic number.

It is an amenable number.

320420130445 is a deficient number, since it is larger than the sum of its proper divisors (64084026095).

320420130445 is an equidigital number, since it uses as much as digits as its factorization.

320420130445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64084026094.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 320420130445 its reverse (544031024023), we get a palindrome (864451154468).

The spelling of 320420130445 in words is "three hundred twenty billion, four hundred twenty million, one hundred thirty thousand, four hundred forty-five".