320780322576 has 480 divisors, whose sum is σ = 1100245968640. Its totient is φ = 88562792448.

The previous prime is 320780322523. The next prime is 320780322589. The reversal of 320780322576 is 675223087023.

320780322576 is a `hidden beast` number, since 3 + 2 + 0 + 78 + 0 + 3 + 2 + 2 + 576 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 158096730 + ... + 158098758.

Almost surely, 2^320780322576 is an apocalyptic number.

320780322576 is a gapful number since it is divisible by the number (36) 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 320780322576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550122984320).

320780322576 is an abundant number, since it is smaller than the sum of its proper divisors (779465646064).

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

320780322576 is a wasteful number, since it uses less digits than its factorization.

320780322576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253 (or 2235 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 320780322576 in words is "three hundred twenty billion, seven hundred eighty million, three hundred twenty-two thousand, five hundred seventy-six".