2016868536681 has 8 divisors (see below), whose sum is σ = 2690831457984. Its totient is φ = 1343742319920.

The previous prime is 2016868536659. The next prime is 2016868536701. The reversal of 2016868536681 is 1866358686102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2016868536681 - 2¹⁵ = 2016868503913 is a prime.

It is a super-2 number, since 2×2016868536681² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2016868536181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209170510 + ... + 209180151.

It is an arithmetic number, because the mean of its divisors is an integer number (336353932248).

Almost surely, 2^{2016868536681} is an apocalyptic number.

It is an amenable number.

2016868536681 is a deficient number, since it is larger than the sum of its proper divisors (673962921303).

2016868536681 is a wasteful number, since it uses less digits than its factorization.

2016868536681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418352271.

The product of its (nonzero) digits is 19906560, while the sum is 60.

The spelling of 2016868536681 in words is "two trillion, sixteen billion, eight hundred sixty-eight million, five hundred thirty-six thousand, six hundred eighty-one".