327721216788 has 240 divisors, whose sum is σ = 1023594485760. Its totient is φ = 89396467776.

The previous prime is 327721216751. The next prime is 327721216813. The reversal of 327721216788 is 887612127723.

327721216788 is a `hidden beast` number, since 327 + 7 + 21 + 216 + 7 + 88 = 666.

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

It is a congruent number.

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 29362753 + ... + 29373911.

It is an arithmetic number, because the mean of its divisors is an integer number (4264977024).

Almost surely, 2^327721216788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 327721216788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511797242880).

327721216788 is an abundant number, since it is smaller than the sum of its proper divisors (695873268972).

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

327721216788 is a wasteful number, since it uses less digits than its factorization.

327721216788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11768 (or 11757 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The spelling of 327721216788 in words is "three hundred twenty-seven billion, seven hundred twenty-one million, two hundred sixteen thousand, seven hundred eighty-eight".