681334814623 has 2 divisors, whose sum is σ = 681334814624. Its totient is φ = 681334814622.

The previous prime is 681334814591. The next prime is 681334814681. The reversal of 681334814623 is 326418433186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681334814623 - 2⁵ = 681334814591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681334817623) 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, 340667407311 + 340667407312.

It is an arithmetic number, because the mean of its divisors is an integer number (340667407312).

Almost surely, 2^681334814623 is an apocalyptic number.

681334814623 is a deficient number, since it is larger than the sum of its proper divisors (1).

681334814623 is an equidigital number, since it uses as much as digits as its factorization.

681334814623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1990656, while the sum is 49.

The spelling of 681334814623 in words is "six hundred eighty-one billion, three hundred thirty-four million, eight hundred fourteen thousand, six hundred twenty-three".