320826805680 has 160 divisors (see below), whose sum is σ = 1053948417984. Its totient is φ = 80453828608.

The previous prime is 320826805679. The next prime is 320826805709. The reversal of 320826805680 is 86508628023.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4933054 + ... + 4997666.

Almost surely, 2^320826805680 is an apocalyptic number.

320826805680 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 320826805680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526974208992).

320826805680 is an abundant number, since it is smaller than the sum of its proper divisors (733121612304).

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

320826805680 is a wasteful number, since it uses less digits than its factorization.

320826805680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65863 (or 65857 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 320826805680 in words is "three hundred twenty billion, eight hundred twenty-six million, eight hundred five thousand, six hundred eighty".