216927651678 has 16 divisors (see below), whose sum is σ = 437835628560. Its totient is φ = 71645829696.

The previous prime is 216927651643. The next prime is 216927651701. The reversal of 216927651678 is 876156729612.

It is a happy number.

216927651678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 165846175 + ... + 165847482.

It is an arithmetic number, because the mean of its divisors is an integer number (27364726785).

Almost surely, 2^216927651678 is an apocalyptic number.

216927651678 is an abundant number, since it is smaller than the sum of its proper divisors (220907976882).

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

216927651678 is a wasteful number, since it uses less digits than its factorization.

216927651678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331693771.

The product of its digits is 15240960, while the sum is 60.

The spelling of 216927651678 in words is "two hundred sixteen billion, nine hundred twenty-seven million, six hundred fifty-one thousand, six hundred seventy-eight".