16685186868499 has 16 divisors (see below), whose sum is σ = 17975346238080. Its totient is φ = 15436371545280.

The previous prime is 16685186868481. The next prime is 16685186868509. The reversal of 16685186868499 is 99486868158661.

16685186868499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16685186868499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16685186868799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2141484 + ... + 6160870.

It is an arithmetic number, because the mean of its divisors is an integer number (1123459139880).

Almost surely, 2^{16685186868499} is an apocalyptic number.

16685186868499 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16685186868499 is a deficient number, since it is larger than the sum of its proper divisors (1290159369581).

16685186868499 is a wasteful number, since it uses less digits than its factorization.

16685186868499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024530.

The product of its digits is 8599633920, while the sum is 85.

The spelling of 16685186868499 in words is "sixteen trillion, six hundred eighty-five billion, one hundred eighty-six million, eight hundred sixty-eight thousand, four hundred ninety-nine".