16686328197 has 64 divisors (see below), whose sum is σ = 28354019328. Its totient is φ = 8477784000.

The previous prime is 16686328163. The next prime is 16686328207. The reversal of 16686328197 is 79182368661.

It is not a de Polignac number, because 16686328197 - 2⁸ = 16686327941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16686328157) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2078922 + ... + 2086932.

It is an arithmetic number, because the mean of its divisors is an integer number (443031552).

Almost surely, 2^16686328197 is an apocalyptic number.

It is an amenable number.

16686328197 is a deficient number, since it is larger than the sum of its proper divisors (11667691131).

16686328197 is a wasteful number, since it uses less digits than its factorization.

16686328197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8230.

The product of its digits is 5225472, while the sum is 57.

The spelling of 16686328197 in words is "sixteen billion, six hundred eighty-six million, three hundred twenty-eight thousand, one hundred ninety-seven".