216688206869103 has 4 divisors (see below), whose sum is σ = 288917609158808. Its totient is φ = 144458804579400.

The previous prime is 216688206869011. The next prime is 216688206869111. The reversal of 216688206869103 is 301968602886612.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 216688206869103 - 2¹⁶ = 216688206803567 is a prime.

It is a super-2 number, since 2×216688206869103² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216688206869153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36114701144848 + ... + 36114701144853.

It is an arithmetic number, because the mean of its divisors is an integer number (72229402289702).

Almost surely, 2^{216688206869103} is an apocalyptic number.

216688206869103 is a deficient number, since it is larger than the sum of its proper divisors (72229402289705).

216688206869103 is an equidigital number, since it uses as much as digits as its factorization.

216688206869103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72229402289704.

The product of its (nonzero) digits is 71663616, while the sum is 66.

The spelling of 216688206869103 in words is "two hundred sixteen trillion, six hundred eighty-eight billion, two hundred six million, eight hundred sixty-nine thousand, one hundred three".