84518008782681 has 16 divisors (see below), whose sum is σ = 114117528892160. Its totient is φ = 55631918759040.

The previous prime is 84518008782673. The next prime is 84518008782707. The reversal of 84518008782681 is 18628780081548.

It is not a de Polignac number, because 84518008782681 - 2³ = 84518008782673 is a prime.

It is a super-2 number, since 2×84518008782681² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84518008782631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122046501 + ... + 122737053.

It is an arithmetic number, because the mean of its divisors is an integer number (7132345555760).

Almost surely, 2^{84518008782681} is an apocalyptic number.

It is an amenable number.

84518008782681 is a deficient number, since it is larger than the sum of its proper divisors (29599520109479).

84518008782681 is a wasteful number, since it uses less digits than its factorization.

84518008782681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207056.

The product of its (nonzero) digits is 55050240, while the sum is 66.

The spelling of 84518008782681 in words is "eighty-four trillion, five hundred eighteen billion, eight million, seven hundred eighty-two thousand, six hundred eighty-one".