320244064540 has 48 divisors (see below), whose sum is σ = 701839494720. Its totient is φ = 122512924160.

The previous prime is 320244064537. The next prime is 320244064549. The reversal of 320244064540 is 45460442023.

It is a junction number, because it is equal to n+sod(n) for n = 320244064496 and 320244064505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320244064549) 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, 4086930 + ... + 4164550.

It is an arithmetic number, because the mean of its divisors is an integer number (14621656140).

Almost surely, 2^320244064540 is an apocalyptic number.

It is an amenable number.

320244064540 is an abundant number, since it is smaller than the sum of its proper divisors (381595430180).

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

320244064540 is a wasteful number, since it uses less digits than its factorization.

320244064540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86622 (or 86620 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 34.

The spelling of 320244064540 in words is "three hundred twenty billion, two hundred forty-four million, sixty-four thousand, five hundred forty".