216688206869104 has 20 divisors (see below), whose sum is σ = 419836481575776. Its totient is φ = 108343308397952.

The previous prime is 216688206869011. The next prime is 216688206869111. The reversal of 216688206869104 is 401968602886612.

It is a super-2 number, since 2×216688206869104² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216688206869104.

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, 47438149 + ... + 51804964.

Almost surely, 2^{216688206869104} is an apocalyptic number.

It is an amenable number.

216688206869104 is a deficient number, since it is larger than the sum of its proper divisors (203148274706672).

216688206869104 is a wasteful number, since it uses less digits than its factorization.

216688206869104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99379584 (or 99379578 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 67.

The spelling of 216688206869104 in words is "two hundred sixteen trillion, six hundred eighty-eight billion, two hundred six million, eight hundred sixty-nine thousand, one hundred four".