256207266041 has 2 divisors, whose sum is σ = 256207266042. Its totient is φ = 256207266040.

The previous prime is 256207266013. The next prime is 256207266143. The reversal of 256207266041 is 140662702652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242429201641 + 13778064400 = 492371^2 + 117380^2 .

It is a cyclic number.

It is not a de Polignac number, because 256207266041 - 2²² = 256203071737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256207266041.

It is not a weakly prime, because it can be changed into another prime (256207266241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128103633020 + 128103633021.

It is an arithmetic number, because the mean of its divisors is an integer number (128103633021).

Almost surely, 2^256207266041 is an apocalyptic number.

It is an amenable number.

256207266041 is a deficient number, since it is larger than the sum of its proper divisors (1).

256207266041 is an equidigital number, since it uses as much as digits as its factorization.

256207266041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 41.

Adding to 256207266041 its reverse (140662702652), we get a palindrome (396869968693).

The spelling of 256207266041 in words is "two hundred fifty-six billion, two hundred seven million, two hundred sixty-six thousand, forty-one".