216988906639942 has 8 divisors (see below), whose sum is σ = 325545844782600. Its totient is φ = 108473625045744.

The previous prime is 216988906639909. The next prime is 216988906639969. The reversal of 216988906639942 is 249936609889612.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10414124092 + ... + 10414144927.

It is an arithmetic number, because the mean of its divisors is an integer number (40693230597825).

Almost surely, 2^{216988906639942} is an apocalyptic number.

216988906639942 is a deficient number, since it is larger than the sum of its proper divisors (108556938142658).

216988906639942 is a wasteful number, since it uses less digits than its factorization.

216988906639942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20828274230.

The product of its (nonzero) digits is 4353564672, while the sum is 82.

The spelling of 216988906639942 in words is "two hundred sixteen trillion, nine hundred eighty-eight billion, nine hundred six million, six hundred thirty-nine thousand, nine hundred forty-two".