256373773241 has 2 divisors, whose sum is σ = 256373773242. Its totient is φ = 256373773240.

The previous prime is 256373773211. The next prime is 256373773277. The reversal of 256373773241 is 142377373652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202496400016 + 53877373225 = 449996^2 + 232115^2 .

It is a cyclic number.

It is not a de Polignac number, because 256373773241 - 2¹⁴ = 256373756857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 256373773241.

It is not a weakly prime, because it can be changed into another prime (256373773211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128186886620 + 128186886621.

It is an arithmetic number, because the mean of its divisors is an integer number (128186886621).

Almost surely, 2^256373773241 is an apocalyptic number.

It is an amenable number.

256373773241 is a deficient number, since it is larger than the sum of its proper divisors (1).

256373773241 is an equidigital number, since it uses as much as digits as its factorization.

256373773241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 50.

The spelling of 256373773241 in words is "two hundred fifty-six billion, three hundred seventy-three million, seven hundred seventy-three thousand, two hundred forty-one".