320163226520 has 64 divisors (see below), whose sum is σ = 730047651840. Its totient is φ = 126353520000.

The previous prime is 320163226519. The next prime is 320163226529. The reversal of 320163226520 is 25622361023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320163226529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 973145 + ... + 1259895.

It is an arithmetic number, because the mean of its divisors is an integer number (11406994560).

Almost surely, 2^320163226520 is an apocalyptic number.

It is an amenable number.

320163226520 is an abundant number, since it is smaller than the sum of its proper divisors (409884425320).

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

320163226520 is a wasteful number, since it uses less digits than its factorization.

320163226520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287136 (or 287132 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 320163226520 its reverse (25622361023), we get a palindrome (345785587543).

The spelling of 320163226520 in words is "three hundred twenty billion, one hundred sixty-three million, two hundred twenty-six thousand, five hundred twenty".