320709621496 has 128 divisors (see below), whose sum is σ = 693057254400. Its totient is φ = 137811525120.

The previous prime is 320709621481. The next prime is 320709621503. The reversal of 320709621496 is 694126907023.

It is a super-2 number, since 2×320709621496² (a number of 24 digits) contains 22 as substring.

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, 21263910 + ... + 21278986.

It is an arithmetic number, because the mean of its divisors is an integer number (5414509800).

Almost surely, 2^320709621496 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 320709621496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346528627200).

320709621496 is an abundant number, since it is smaller than the sum of its proper divisors (372347632904).

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

320709621496 is a wasteful number, since it uses less digits than its factorization.

320709621496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15317 (or 15313 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 320709621496 in words is "three hundred twenty billion, seven hundred nine million, six hundred twenty-one thousand, four hundred ninety-six".