216851777218118 has 8 divisors (see below), whose sum is σ = 371745903802512. Its totient is φ = 92936475950616.

The previous prime is 216851777218057. The next prime is 216851777218129. The reversal of 216851777218118 is 811812777158612.

216851777218118 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 congruent number.

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, 7744706329205 + ... + 7744706329232.

It is an arithmetic number, because the mean of its divisors is an integer number (46468237975314).

Almost surely, 2^{216851777218118} is an apocalyptic number.

216851777218118 is a deficient number, since it is larger than the sum of its proper divisors (154894126584394).

216851777218118 is a wasteful number, since it uses less digits than its factorization.

216851777218118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15489412658446.

The product of its digits is 21073920, while the sum is 65.

The spelling of 216851777218118 in words is "two hundred sixteen trillion, eight hundred fifty-one billion, seven hundred seventy-seven million, two hundred eighteen thousand, one hundred eighteen".