681986689186 has 16 divisors (see below), whose sum is σ = 1164499011648. Its totient is φ = 296515951600.

The previous prime is 681986689169. The next prime is 681986689229.

681986689186 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673899385 + ... + 673900396.

It is an arithmetic number, because the mean of its divisors is an integer number (72781188228).

Almost surely, 2^681986689186 is an apocalyptic number.

681986689186 is a deficient number, since it is larger than the sum of its proper divisors (482512322462).

681986689186 is a wasteful number, since it uses less digits than its factorization.

681986689186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347799817.

The product of its digits is 429981696, while the sum is 76.

The spelling of 681986689186 in words is "six hundred eighty-one billion, nine hundred eighty-six million, six hundred eighty-nine thousand, one hundred eighty-six".