256763073347719 has 2 divisors, whose sum is σ = 256763073347720. Its totient is φ = 256763073347718.

The previous prime is 256763073347717. The next prime is 256763073347779. The reversal of 256763073347719 is 917743370367652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256763073347719 - 2¹ = 256763073347717 is a prime.

It is a super-2 number, since 2×256763073347719² (a number of 30 digits) contains 22 as substring.

Together with 256763073347717, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256763073347717) 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, 128381536673859 + 128381536673860.

It is an arithmetic number, because the mean of its divisors is an integer number (128381536673860).

Almost surely, 2^{256763073347719} is an apocalyptic number.

256763073347719 is a deficient number, since it is larger than the sum of its proper divisors (1).

256763073347719 is an equidigital number, since it uses as much as digits as its factorization.

256763073347719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840157920, while the sum is 70.

The spelling of 256763073347719 in words is "two hundred fifty-six trillion, seven hundred sixty-three billion, seventy-three million, three hundred forty-seven thousand, seven hundred nineteen".