328771814640 has 160 divisors (see below), whose sum is σ = 1049440242240. Its totient is φ = 85082775552.

The previous prime is 328771814621. The next prime is 328771814659. The reversal of 328771814640 is 46418177823.

It is an interprime number because it is at equal distance from previous prime (328771814621) and next prime (328771814659).

It is a super-2 number, since 2×328771814640² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 3406732 + ... + 3501908.

It is an arithmetic number, because the mean of its divisors is an integer number (6559001514).

Almost surely, 2^328771814640 is an apocalyptic number.

328771814640 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 328771814640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524720121120).

328771814640 is an abundant number, since it is smaller than the sum of its proper divisors (720668427600).

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

328771814640 is a wasteful number, since it uses less digits than its factorization.

328771814640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95619 (or 95613 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 51.

It can be divided in two parts, 328771 and 814640, that added together give a palindrome (1143411).

The spelling of 328771814640 in words is "three hundred twenty-eight billion, seven hundred seventy-one million, eight hundred fourteen thousand, six hundred forty".