216384008568 has 128 divisors (see below), whose sum is σ = 669646656000. Its totient is φ = 56738336256.

The previous prime is 216384008567. The next prime is 216384008597. The reversal of 216384008568 is 865800483612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 216384008568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216384008563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91483 + ... + 664181.

It is an arithmetic number, because the mean of its divisors is an integer number (5231614500).

Almost surely, 2^216384008568 is an apocalyptic number.

216384008568 is a gapful number since it is divisible by the number (28) 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 216384008568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334823328000).

216384008568 is an abundant number, since it is smaller than the sum of its proper divisors (453262647432).

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

216384008568 is a wasteful number, since it uses less digits than its factorization.

216384008568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572901 (or 572897 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 51.

The spelling of 216384008568 in words is "two hundred sixteen billion, three hundred eighty-four million, eight thousand, five hundred sixty-eight".