216188868461284 has 6 divisors (see below), whose sum is σ = 378330519807254. Its totient is φ = 108094434230640.

The previous prime is 216188868461273. The next prime is 216188868461323. The reversal of 216188868461284 is 482164868881612.

It can be written as a sum of positive squares in only one way, i.e., 159318115248384 + 56870753212900 = 12622128^2 + 7541270^2 .

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 as a sum of consecutive naturals, namely, 27023608557657 + ... + 27023608557664.

Almost surely, 2^{216188868461284} is an apocalyptic number.

It is an amenable number.

216188868461284 is a deficient number, since it is larger than the sum of its proper divisors (162141651345970).

216188868461284 is a wasteful number, since it uses less digits than its factorization.

216188868461284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54047217115325 (or 54047217115323 counting only the distinct ones).

The product of its digits is 452984832, while the sum is 73.

The spelling of 216188868461284 in words is "two hundred sixteen trillion, one hundred eighty-eight billion, eight hundred sixty-eight million, four hundred sixty-one thousand, two hundred eighty-four".