256510107057247 has 16 divisors (see below), whose sum is σ = 266470081081344. Its totient is φ = 246726567640000.

The previous prime is 256510107057241. The next prime is 256510107057299. The reversal of 256510107057247 is 742750701015652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256510107057247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256510107057194 and 256510107057203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256510107057241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329506122 + ... + 330283672.

It is an arithmetic number, because the mean of its divisors is an integer number (16654380067584).

Almost surely, 2^{256510107057247} is an apocalyptic number.

256510107057247 is a deficient number, since it is larger than the sum of its proper divisors (9959974024097).

256510107057247 is a wasteful number, since it uses less digits than its factorization.

256510107057247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890990.

The product of its (nonzero) digits is 4116000, while the sum is 52.

The spelling of 256510107057247 in words is "two hundred fifty-six trillion, five hundred ten billion, one hundred seven million, fifty-seven thousand, two hundred forty-seven".