320391691936 has 24 divisors (see below), whose sum is σ = 630862223040. Its totient is φ = 160172714688.

The previous prime is 320391691931. The next prime is 320391691969. The reversal of 320391691936 is 639196193023.

It is a super-2 number, since 2×320391691936² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320391691931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496686 + ... + 942061.

It is an arithmetic number, because the mean of its divisors is an integer number (26285925960).

Almost surely, 2^320391691936 is an apocalyptic number.

It is an amenable number.

320391691936 is a deficient number, since it is larger than the sum of its proper divisors (310470531104).

320391691936 is a wasteful number, since it uses less digits than its factorization.

320391691936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445716 (or 1445708 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 52.

The spelling of 320391691936 in words is "three hundred twenty billion, three hundred ninety-one million, six hundred ninety-one thousand, nine hundred thirty-six".