320377327818 has 32 divisors (see below), whose sum is σ = 679330982400. Its totient is φ = 100443928176.

The previous prime is 320377327811. The next prime is 320377327849. The reversal of 320377327818 is 818723773023.

It is a super-2 number, since 2×320377327818² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320377327811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10093246 + ... + 10124937.

It is an arithmetic number, because the mean of its divisors is an integer number (21229093200).

Almost surely, 2^320377327818 is an apocalyptic number.

320377327818 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

320377327818 is an abundant number, since it is smaller than the sum of its proper divisors (358953654582).

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

320377327818 is a wasteful number, since it uses less digits than its factorization.

320377327818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20218346.

The product of its (nonzero) digits is 2370816, while the sum is 51.

The spelling of 320377327818 in words is "three hundred twenty billion, three hundred seventy-seven million, three hundred twenty-seven thousand, eight hundred eighteen".