256506336267043 has 2 divisors, whose sum is σ = 256506336267044. Its totient is φ = 256506336267042.

The previous prime is 256506336266987. The next prime is 256506336267101. The reversal of 256506336267043 is 340762633605652.

It is an a-pointer prime, because the next prime (256506336267101) can be obtained adding 256506336267043 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256506336267043 - 2¹⁷ = 256506336135971 is a prime.

It is not a weakly prime, because it can be changed into another prime (256506336237043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128253168133521 + 128253168133522.

It is an arithmetic number, because the mean of its divisors is an integer number (128253168133522).

Almost surely, 2^{256506336267043} is an apocalyptic number.

256506336267043 is a deficient number, since it is larger than the sum of its proper divisors (1).

256506336267043 is an equidigital number, since it uses as much as digits as its factorization.

256506336267043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97977600, while the sum is 58.

The spelling of 256506336267043 in words is "two hundred fifty-six trillion, five hundred six billion, three hundred thirty-six million, two hundred sixty-seven thousand, forty-three".