681831874547 has 2 divisors, whose sum is σ = 681831874548. Its totient is φ = 681831874546.

The previous prime is 681831874519. The next prime is 681831874597. The reversal of 681831874547 is 745478138186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681831874547 - 2⁸ = 681831874291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 681831874547.

It is not a weakly prime, because it can be changed into another prime (681831874597) 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 as a sum of consecutive naturals, namely, 340915937273 + 340915937274.

It is an arithmetic number, because the mean of its divisors is an integer number (340915937274).

Almost surely, 2^681831874547 is an apocalyptic number.

681831874547 is a deficient number, since it is larger than the sum of its proper divisors (1).

681831874547 is an equidigital number, since it uses as much as digits as its factorization.

681831874547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36126720, while the sum is 62.

The spelling of 681831874547 in words is "six hundred eighty-one billion, eight hundred thirty-one million, eight hundred seventy-four thousand, five hundred forty-seven".