256743504148727 has 2 divisors, whose sum is σ = 256743504148728. Its totient is φ = 256743504148726.

The previous prime is 256743504148693. The next prime is 256743504148763. The reversal of 256743504148727 is 727841405347652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256743504148727 - 2⁸ = 256743504148471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256743504148777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128371752074363 + 128371752074364.

It is an arithmetic number, because the mean of its divisors is an integer number (128371752074364).

Almost surely, 2^{256743504148727} is an apocalyptic number.

256743504148727 is a deficient number, since it is larger than the sum of its proper divisors (1).

256743504148727 is an equidigital number, since it uses as much as digits as its factorization.

256743504148727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 316108800, while the sum is 65.

The spelling of 256743504148727 in words is "two hundred fifty-six trillion, seven hundred forty-three billion, five hundred four million, one hundred forty-eight thousand, seven hundred twenty-seven".