16688702216684 has 6 divisors (see below), whose sum is σ = 29205228879204. Its totient is φ = 8344351108340.

The previous prime is 16688702216677. The next prime is 16688702216689. The reversal of 16688702216684 is 48661220788661.

It is a self number, because there is not a number n which added to its sum of digits gives 16688702216684.

It is not an unprimeable number, because it can be changed into a prime (16688702216689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2086087777082 + ... + 2086087777089.

It is an arithmetic number, because the mean of its divisors is an integer number (4867538146534).

Almost surely, 2^{16688702216684} is an apocalyptic number.

It is an amenable number.

16688702216684 is a deficient number, since it is larger than the sum of its proper divisors (12516526662520).

16688702216684 is a wasteful number, since it uses less digits than its factorization.

16688702216684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4172175554175 (or 4172175554173 counting only the distinct ones).

The product of its (nonzero) digits is 74317824, while the sum is 65.

The spelling of 16688702216684 in words is "sixteen trillion, six hundred eighty-eight billion, seven hundred two million, two hundred sixteen thousand, six hundred eighty-four".