216581858198 has 8 divisors (see below), whose sum is σ = 324923401920. Its totient is φ = 108274057560.

The previous prime is 216581858189. The next prime is 216581858237. The reversal of 216581858198 is 891858185612.

216581858198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 216581858198.

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 3 ways as a sum of consecutive naturals, for example, 8419718 + ... + 8445401.

It is an arithmetic number, because the mean of its divisors is an integer number (40615425240).

Almost surely, 2^216581858198 is an apocalyptic number.

216581858198 is a deficient number, since it is larger than the sum of its proper divisors (108341543722).

216581858198 is a wasteful number, since it uses less digits than its factorization.

216581858198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16871542.

The product of its digits is 11059200, while the sum is 62.

The spelling of 216581858198 in words is "two hundred sixteen billion, five hundred eighty-one million, eight hundred fifty-eight thousand, one hundred ninety-eight".