681495338423 has 2 divisors, whose sum is σ = 681495338424. Its totient is φ = 681495338422.

The previous prime is 681495338417. The next prime is 681495338441. The reversal of 681495338423 is 324833594186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681495338423 - 2¹⁰ = 681495337399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681495334423) 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, 340747669211 + 340747669212.

It is an arithmetic number, because the mean of its divisors is an integer number (340747669212).

Almost surely, 2^681495338423 is an apocalyptic number.

681495338423 is a deficient number, since it is larger than the sum of its proper divisors (1).

681495338423 is an equidigital number, since it uses as much as digits as its factorization.

681495338423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14929920, while the sum is 56.

The spelling of 681495338423 in words is "six hundred eighty-one billion, four hundred ninety-five million, three hundred thirty-eight thousand, four hundred twenty-three".