216381370668 has 24 divisors (see below), whose sum is σ = 511280878080. Its totient is φ = 71214121680.

The previous prime is 216381370649. The next prime is 216381370729. The reversal of 216381370668 is 866073183612.

It is a self number, because there is not a number n which added to its sum of digits gives 216381370668.

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 7 ways as a sum of consecutive naturals, for example, 114124248 + ... + 114126143.

It is an arithmetic number, because the mean of its divisors is an integer number (21303369920).

Almost surely, 2^216381370668 is an apocalyptic number.

It is an amenable number.

216381370668 is an abundant number, since it is smaller than the sum of its proper divisors (294899507412).

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

216381370668 is a wasteful number, since it uses less digits than its factorization.

216381370668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228250477 (or 228250475 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 216381370668 in words is "two hundred sixteen billion, three hundred eighty-one million, three hundred seventy thousand, six hundred sixty-eight".