216186291218 has 8 divisors (see below), whose sum is σ = 338378542848. Its totient is φ = 103393443604.

The previous prime is 216186291197. The next prime is 216186291227. The reversal of 216186291218 is 812192681612.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2349850946 + ... + 2349851037.

It is an arithmetic number, because the mean of its divisors is an integer number (42297317856).

Almost surely, 2^216186291218 is an apocalyptic number.

216186291218 is a deficient number, since it is larger than the sum of its proper divisors (122192251630).

216186291218 is a wasteful number, since it uses less digits than its factorization.

216186291218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4699702008.

The product of its digits is 165888, while the sum is 47.

The spelling of 216186291218 in words is "two hundred sixteen billion, one hundred eighty-six million, two hundred ninety-one thousand, two hundred eighteen".