681748424847186 has 32 divisors (see below), whose sum is σ = 1417219779987648. Its totient is φ = 218443650287040.

The previous prime is 681748424847011. The next prime is 681748424847187.

It is a happy number.

681748424847186 is nontrivially palindromic in base 10.

681748424847186 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (681748424847187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18499613205 + ... + 18499650056.

It is an arithmetic number, because the mean of its divisors is an integer number (44288118124614).

Almost surely, 2^{681748424847186} is an apocalyptic number.

681748424847186 is an abundant number, since it is smaller than the sum of its proper divisors (735471355140462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681748424847186 is a wasteful number, since it uses less digits than its factorization.

681748424847186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36999263386.

The product of its digits is 3699376128, while the sum is 78.

The spelling of 681748424847186 in words is "six hundred eighty-one trillion, seven hundred forty-eight billion, four hundred twenty-four million, eight hundred forty-seven thousand, one hundred eighty-six".