681783461431 has 2 divisors, whose sum is σ = 681783461432. Its totient is φ = 681783461430.

The previous prime is 681783461419. The next prime is 681783461441. The reversal of 681783461431 is 134164387186.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681783461431 - 2²¹ = 681781364279 is a prime.

It is a super-2 number, since 2×681783461431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681783461441) 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, 340891730715 + 340891730716.

It is an arithmetic number, because the mean of its divisors is an integer number (340891730716).

Almost surely, 2^681783461431 is an apocalyptic number.

681783461431 is a deficient number, since it is larger than the sum of its proper divisors (1).

681783461431 is an equidigital number, since it uses as much as digits as its factorization.

681783461431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 52.

The spelling of 681783461431 in words is "six hundred eighty-one billion, seven hundred eighty-three million, four hundred sixty-one thousand, four hundred thirty-one".