256766055362247 has 32 divisors (see below), whose sum is σ = 369560481454080. Its totient is φ = 158087929852160.

The previous prime is 256766055362177. The next prime is 256766055362251. The reversal of 256766055362247 is 742263550667652.

It is a cyclic number.

It is not a de Polignac number, because 256766055362247 - 2¹⁰ = 256766055361223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256766055363247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 545111122 + ... + 545581952.

It is an arithmetic number, because the mean of its divisors is an integer number (11548765045440).

Almost surely, 2^{256766055362247} is an apocalyptic number.

256766055362247 is a deficient number, since it is larger than the sum of its proper divisors (112794426091833).

256766055362247 is a wasteful number, since it uses less digits than its factorization.

256766055362247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743423.

The product of its (nonzero) digits is 762048000, while the sum is 66.

The spelling of 256766055362247 in words is "two hundred fifty-six trillion, seven hundred sixty-six billion, fifty-five million, three hundred sixty-two thousand, two hundred forty-seven".