320868327780 has 1440 divisors, whose sum is σ = 1436597648640. Its totient is φ = 58821396480.

The previous prime is 320868327713. The next prime is 320868327809. The reversal of 320868327780 is 87723868023.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 261080206 + ... + 261081434.

It is an arithmetic number, because the mean of its divisors is an integer number (997637256).

Almost surely, 2^320868327780 is an apocalyptic number.

320868327780 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 320868327780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718298824320).

320868327780 is an abundant number, since it is smaller than the sum of its proper divisors (1115729320860).

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

320868327780 is a wasteful number, since it uses less digits than its factorization.

320868327780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311 (or 1293 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 320868327780 in words is "three hundred twenty billion, eight hundred sixty-eight million, three hundred twenty-seven thousand, seven hundred eighty".