320216680664 has 16 divisors (see below), whose sum is σ = 619774221120. Its totient is φ = 154943555040.

The previous prime is 320216680649. The next prime is 320216680687. The reversal of 320216680664 is 466086612023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645597899 + ... + 645598394.

It is an arithmetic number, because the mean of its divisors is an integer number (38735888820).

Almost surely, 2^320216680664 is an apocalyptic number.

It is an amenable number.

320216680664 is a deficient number, since it is larger than the sum of its proper divisors (299557540456).

320216680664 is a wasteful number, since it uses less digits than its factorization.

320216680664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291196330 (or 1291196326 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 320216680664 in words is "three hundred twenty billion, two hundred sixteen million, six hundred eighty thousand, six hundred sixty-four".