16684185009378 has 16 divisors (see below), whose sum is σ = 34078335338880. Its totient is φ = 5443067449776.

The previous prime is 16684185009377. The next prime is 16684185009397. The reversal of 16684185009378 is 87390058148661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16684185009377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29581888033 + ... + 29581888596.

It is an arithmetic number, because the mean of its divisors is an integer number (2129895958680).

Almost surely, 2^{16684185009378} is an apocalyptic number.

16684185009378 is an abundant number, since it is smaller than the sum of its proper divisors (17394150329502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16684185009378 is a wasteful number, since it uses less digits than its factorization.

16684185009378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59163776681.

The product of its (nonzero) digits is 69672960, while the sum is 66.

The spelling of 16684185009378 in words is "sixteen trillion, six hundred eighty-four billion, one hundred eighty-five million, nine thousand, three hundred seventy-eight".