256006675481 has 2 divisors, whose sum is σ = 256006675482. Its totient is φ = 256006675480.

The previous prime is 256006675471. The next prime is 256006675559. The reversal of 256006675481 is 184576600652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171727360000 + 84279315481 = 414400^2 + 290309^2 .

It is a cyclic number.

It is not a de Polignac number, because 256006675481 - 2¹⁰ = 256006674457 is a prime.

It is a super-2 number, since 2×256006675481² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (256006675471) 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, 128003337740 + 128003337741.

It is an arithmetic number, because the mean of its divisors is an integer number (128003337741).

Almost surely, 2^256006675481 is an apocalyptic number.

It is an amenable number.

256006675481 is a deficient number, since it is larger than the sum of its proper divisors (1).

256006675481 is an equidigital number, since it uses as much as digits as its factorization.

256006675481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 256006675481 in words is "two hundred fifty-six billion, six million, six hundred seventy-five thousand, four hundred eighty-one".