320612405660 has 24 divisors (see below), whose sum is σ = 708722160720. Its totient is φ = 121495227264.

The previous prime is 320612405657. The next prime is 320612405741. The reversal of 320612405660 is 66504216023.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 320612405660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421858049 + ... + 421858808.

It is an arithmetic number, because the mean of its divisors is an integer number (29530090030).

Almost surely, 2^320612405660 is an apocalyptic number.

It is an amenable number.

320612405660 is an abundant number, since it is smaller than the sum of its proper divisors (388109755060).

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

320612405660 is a wasteful number, since it uses less digits than its factorization.

320612405660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843716885 (or 843716883 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 320612405660 in words is "three hundred twenty billion, six hundred twelve million, four hundred five thousand, six hundred sixty".