320609559648 has 192 divisors, whose sum is σ = 975949793280. Its totient is φ = 90260324352.

The previous prime is 320609559607. The next prime is 320609559659. The reversal of 320609559648 is 846955906023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63623113 + ... + 63628151.

It is an arithmetic number, because the mean of its divisors is an integer number (5083071840).

Almost surely, 2^320609559648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320609559648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487974896640).

320609559648 is an abundant number, since it is smaller than the sum of its proper divisors (655340233632).

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

320609559648 is a wasteful number, since it uses less digits than its factorization.

320609559648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429 (or 6421 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 57.

The spelling of 320609559648 in words is "three hundred twenty billion, six hundred nine million, five hundred fifty-nine thousand, six hundred forty-eight".