682587785281 has 2 divisors, whose sum is σ = 682587785282. Its totient is φ = 682587785280.

The previous prime is 682587785279. The next prime is 682587785287. The reversal of 682587785281 is 182587785286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 582504768400 + 100083016881 = 763220^2 + 316359^2 .

It is a cyclic number.

It is not a de Polignac number, because 682587785281 - 2¹ = 682587785279 is a prime.

It is a super-2 number, since 2×682587785281² (a number of 24 digits) contains 22 as substring.

Together with 682587785279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (682587785287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341293892640 + 341293892641.

It is an arithmetic number, because the mean of its divisors is an integer number (341293892641).

Almost surely, 2^682587785281 is an apocalyptic number.

It is an amenable number.

682587785281 is a deficient number, since it is larger than the sum of its proper divisors (1).

682587785281 is an equidigital number, since it uses as much as digits as its factorization.

682587785281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120422400, while the sum is 67.

The spelling of 682587785281 in words is "six hundred eighty-two billion, five hundred eighty-seven million, seven hundred eighty-five thousand, two hundred eighty-one".