256683315080503 has 2 divisors, whose sum is σ = 256683315080504. Its totient is φ = 256683315080502.

The previous prime is 256683315080389. The next prime is 256683315080587. The reversal of 256683315080503 is 305080513386652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256683315080503 - 2⁴¹ = 254484291824951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256683315080593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128341657540251 + 128341657540252.

It is an arithmetic number, because the mean of its divisors is an integer number (128341657540252).

Almost surely, 2^{256683315080503} is an apocalyptic number.

256683315080503 is a deficient number, since it is larger than the sum of its proper divisors (1).

256683315080503 is an equidigital number, since it uses as much as digits as its factorization.

256683315080503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552000, while the sum is 55.

The spelling of 256683315080503 in words is "two hundred fifty-six trillion, six hundred eighty-three billion, three hundred fifteen million, eighty thousand, five hundred three".