681097041847 has 2 divisors, whose sum is σ = 681097041848. Its totient is φ = 681097041846.

The previous prime is 681097041829. The next prime is 681097041917. The reversal of 681097041847 is 748140790186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681097041847 - 2²³ = 681088653239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681097048847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340548520923 + 340548520924.

It is an arithmetic number, because the mean of its divisors is an integer number (340548520924).

Almost surely, 2^681097041847 is an apocalyptic number.

681097041847 is a deficient number, since it is larger than the sum of its proper divisors (1).

681097041847 is an equidigital number, since it uses as much as digits as its factorization.

681097041847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 681097041847 in words is "six hundred eighty-one billion, ninety-seven million, forty-one thousand, eight hundred forty-seven".