221876843692168 has 64 divisors (see below), whose sum is σ = 485571382732800. Its totient is φ = 93065917174080.

The previous prime is 221876843692151. The next prime is 221876843692219. The reversal of 221876843692168 is 861296348678122.

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 221876843692168.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289903743 + ... + 290668081.

It is an arithmetic number, because the mean of its divisors is an integer number (7587052855200).

Almost surely, 2^{221876843692168} is an apocalyptic number.

221876843692168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

221876843692168 is an abundant number, since it is smaller than the sum of its proper divisors (263694539040632).

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

221876843692168 is a wasteful number, since it uses less digits than its factorization.

221876843692168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874690 (or 874686 counting only the distinct ones).

The product of its digits is 668860416, while the sum is 73.

The spelling of 221876843692168 in words is "two hundred twenty-one trillion, eight hundred seventy-six billion, eight hundred forty-three million, six hundred ninety-two thousand, one hundred sixty-eight".