320615506560 has 256 divisors, whose sum is σ = 1097325792000. Its totient is φ = 79334277120.

The previous prime is 320615506531. The next prime is 320615506591. The reversal of 320615506560 is 65605516023.

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, 2248266 + ... + 2386614.

It is an arithmetic number, because the mean of its divisors is an integer number (4286428875).

Almost surely, 2^320615506560 is an apocalyptic number.

320615506560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320615506560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (548662896000).

320615506560 is an abundant number, since it is smaller than the sum of its proper divisors (776710285440).

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

320615506560 is a wasteful number, since it uses less digits than its factorization.

320615506560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138459 (or 138447 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 39.

The spelling of 320615506560 in words is "three hundred twenty billion, six hundred fifteen million, five hundred six thousand, five hundred sixty".