320320162520 has 32 divisors (see below), whose sum is σ = 720777063600. Its totient is φ = 128117985408.

The previous prime is 320320162511. The next prime is 320320162543. The reversal of 320320162520 is 25261023023.

It is a self number, because there is not a number n which added to its sum of digits gives 320320162520.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 210662 + ... + 827658.

Almost surely, 2^320320162520 is an apocalyptic number.

It is an amenable number.

320320162520 is an abundant number, since it is smaller than the sum of its proper divisors (400456901080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320320162520 is a wasteful number, since it uses less digits than its factorization.

320320162520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629987 (or 629983 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 320320162520 its reverse (25261023023), we get a palindrome (345581185543).

The spelling of 320320162520 in words is "three hundred twenty billion, three hundred twenty million, one hundred sixty-two thousand, five hundred twenty".