320535320520 has 32 divisors (see below), whose sum is σ = 961605961920. Its totient is φ = 85476085440.

The previous prime is 320535320503. The next prime is 320535320617. The reversal of 320535320520 is 25023535023.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1335563716 + ... + 1335563955.

It is an arithmetic number, because the mean of its divisors is an integer number (30050186310).

Almost surely, 2^320535320520 is an apocalyptic number.

320535320520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320535320520 is an abundant number, since it is smaller than the sum of its proper divisors (641070641400).

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

320535320520 is a wasteful number, since it uses less digits than its factorization.

320535320520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671127685 (or 2671127681 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 30.

Adding to 320535320520 its reverse (25023535023), we get a palindrome (345558855543).

The spelling of 320535320520 in words is "three hundred twenty billion, five hundred thirty-five million, three hundred twenty thousand, five hundred twenty".