320621765865376 has 48 divisors (see below), whose sum is σ = 640659899093760. Its totient is φ = 157914598533120.

The previous prime is 320621765865343. The next prime is 320621765865403. The reversal of 320621765865376 is 673568567126023.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94035345 + ... + 97385263.

It is an arithmetic number, because the mean of its divisors is an integer number (13347081231120).

Almost surely, 2^{320621765865376} is an apocalyptic number.

It is an amenable number.

320621765865376 is a deficient number, since it is larger than the sum of its proper divisors (320038133228384).

320621765865376 is a wasteful number, since it uses less digits than its factorization.

320621765865376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394637 (or 3394629 counting only the distinct ones).

The product of its (nonzero) digits is 457228800, while the sum is 67.

The spelling of 320621765865376 in words is "three hundred twenty trillion, six hundred twenty-one billion, seven hundred sixty-five million, eight hundred sixty-five thousand, three hundred seventy-six".