256823127553684 has 12 divisors (see below), whose sum is σ = 449440585399008. Its totient is φ = 128411531725400.

The previous prime is 256823127553651. The next prime is 256823127553693. The reversal of 256823127553684 is 486355721328652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27988179 + ... + 36013669.

It is an arithmetic number, because the mean of its divisors is an integer number (37453382116584).

Almost surely, 2^{256823127553684} is an apocalyptic number.

It is an amenable number.

256823127553684 is a deficient number, since it is larger than the sum of its proper divisors (192617457845324).

256823127553684 is a wasteful number, since it uses less digits than its factorization.

256823127553684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16025726 (or 16025724 counting only the distinct ones).

The product of its digits is 580608000, while the sum is 67.

The spelling of 256823127553684 in words is "two hundred fifty-six trillion, eight hundred twenty-three billion, one hundred twenty-seven million, five hundred fifty-three thousand, six hundred eighty-four".