216985964146 has 16 divisors (see below), whose sum is σ = 376684496640. Its totient is φ = 91816845120.

The previous prime is 216985964137. The next prime is 216985964219. The reversal of 216985964146 is 641469589612.

It is a happy number.

216985964146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 98093815 + ... + 98096026.

It is an arithmetic number, because the mean of its divisors is an integer number (23542781040).

Almost surely, 2^216985964146 is an apocalyptic number.

216985964146 is a deficient number, since it is larger than the sum of its proper divisors (159698532494).

216985964146 is a wasteful number, since it uses less digits than its factorization.

216985964146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196189929.

The product of its digits is 22394880, while the sum is 61.

The spelling of 216985964146 in words is "two hundred sixteen billion, nine hundred eighty-five million, nine hundred sixty-four thousand, one hundred forty-six".