16306782204681 has 12 divisors (see below), whose sum is σ = 23612979723060. Its totient is φ = 10844077939200.

The previous prime is 16306782204623. The next prime is 16306782204737. The reversal of 16306782204681 is 18640228760361.

It is a happy number.

16306782204681 is a `hidden beast` number, since 1 + 6 + 306 + 78 + 2 + 204 + 68 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11652774195456 + 4654008009225 = 3413616^2 + 2157315^2 .

It is not a de Polignac number, because 16306782204681 - 2¹⁴ = 16306782188297 is a prime.

It is a super-2 number, since 2×16306782204681² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16306782204281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2259179296 + ... + 2259186513.

It is an arithmetic number, because the mean of its divisors is an integer number (1967748310255).

Almost surely, 2^{16306782204681} is an apocalyptic number.

It is an amenable number.

16306782204681 is a deficient number, since it is larger than the sum of its proper divisors (7306197518379).

16306782204681 is a wasteful number, since it uses less digits than its factorization.

16306782204681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518366216 (or 4518366213 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 16306782204681 in words is "sixteen trillion, three hundred six billion, seven hundred eighty-two million, two hundred four thousand, six hundred eighty-one".