320323215660040 has 64 divisors (see below), whose sum is σ = 724404079180800. Its totient is φ = 127476443774208.

The previous prime is 320323215660037. The next prime is 320323215660089. The reversal of 320323215660040 is 40066512323023.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268984 + ... + 25312423.

It is an arithmetic number, because the mean of its divisors is an integer number (11318813737200).

Almost surely, 2^{320323215660040} is an apocalyptic number.

It is an amenable number.

320323215660040 is an abundant number, since it is smaller than the sum of its proper divisors (404080863520760).

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

320323215660040 is a wasteful number, since it uses less digits than its factorization.

320323215660040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25583014 (or 25583010 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 37.

Adding to 320323215660040 its reverse (40066512323023), we get a palindrome (360389727983063).

The spelling of 320323215660040 in words is "three hundred twenty trillion, three hundred twenty-three billion, two hundred fifteen million, six hundred sixty thousand, forty".