256605467359 has 2 divisors, whose sum is σ = 256605467360. Its totient is φ = 256605467358.

The previous prime is 256605467303. The next prime is 256605467381. The reversal of 256605467359 is 953764506652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256605467359 - 2¹⁷ = 256605336287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256605467399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128302733679 + 128302733680.

It is an arithmetic number, because the mean of its divisors is an integer number (128302733680).

Almost surely, 2^256605467359 is an apocalyptic number.

256605467359 is a deficient number, since it is larger than the sum of its proper divisors (1).

256605467359 is an equidigital number, since it uses as much as digits as its factorization.

256605467359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824000, while the sum is 58.

The spelling of 256605467359 in words is "two hundred fifty-six billion, six hundred five million, four hundred sixty-seven thousand, three hundred fifty-nine".