1698874161681 has 32 divisors (see below), whose sum is σ = 2315092082688. Its totient is φ = 1107979629120.

The previous prime is 1698874161653. The next prime is 1698874161707. The reversal of 1698874161681 is 1861614788961.

It is not a de Polignac number, because 1698874161681 - 2¹⁰ = 1698874160657 is a prime.

It is a super-3 number, since 3×1698874161681³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1698874163681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7727626 + ... + 7944428.

It is an arithmetic number, because the mean of its divisors is an integer number (72346627584).

Almost surely, 2^{1698874161681} is an apocalyptic number.

It is an amenable number.

1698874161681 is a deficient number, since it is larger than the sum of its proper divisors (616217921007).

1698874161681 is a wasteful number, since it uses less digits than its factorization.

1698874161681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217221.

The product of its digits is 27869184, while the sum is 66.

The spelling of 1698874161681 in words is "one trillion, six hundred ninety-eight billion, eight hundred seventy-four million, one hundred sixty-one thousand, six hundred eighty-one".