256507244164135 has 16 divisors (see below), whose sum is σ = 308203326434016. Its totient is φ = 204942712330368.

The previous prime is 256507244164117. The next prime is 256507244164163. The reversal of 256507244164135 is 531461442705652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 256507244164135 - 2¹¹ = 256507244162087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398990809 + ... + 399633181.

It is an arithmetic number, because the mean of its divisors is an integer number (19262707902126).

Almost surely, 2^{256507244164135} is an apocalyptic number.

256507244164135 is a deficient number, since it is larger than the sum of its proper divisors (51696082269881).

256507244164135 is a wasteful number, since it uses less digits than its factorization.

256507244164135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744642.

The product of its (nonzero) digits is 24192000, while the sum is 55.

Adding to 256507244164135 its reverse (531461442705652), we get a palindrome (787968686869787).

The spelling of 256507244164135 in words is "two hundred fifty-six trillion, five hundred seven billion, two hundred forty-four million, one hundred sixty-four thousand, one hundred thirty-five".