320427309495920 has 40 divisors (see below), whose sum is σ = 812720175905520. Its totient is φ = 116519021634560.

The previous prime is 320427309495863. The next prime is 320427309495929. The reversal of 320427309495920 is 29594903724023.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 320427309495920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320427309495929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182060970425 + ... + 182060972184.

It is an arithmetic number, because the mean of its divisors is an integer number (20318004397638).

Almost surely, 2^{320427309495920} is an apocalyptic number.

It is an amenable number.

320427309495920 is an abundant number, since it is smaller than the sum of its proper divisors (492292866409600).

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

320427309495920 is a wasteful number, since it uses less digits than its factorization.

320427309495920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364121942633 (or 364121942627 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 59.

The spelling of 320427309495920 in words is "three hundred twenty trillion, four hundred twenty-seven billion, three hundred nine million, four hundred ninety-five thousand, nine hundred twenty".