256205664826 has 16 divisors (see below), whose sum is σ = 398919467520. Its totient is φ = 123321872880.

The previous prime is 256205664713. The next prime is 256205664829. The reversal of 256205664826 is 628466502652.

256205664826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256205664826² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256205664829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22335186 + ... + 22346653.

It is an arithmetic number, because the mean of its divisors is an integer number (24932466720).

Almost surely, 2^256205664826 is an apocalyptic number.

256205664826 is a deficient number, since it is larger than the sum of its proper divisors (142713802694).

256205664826 is a wasteful number, since it uses less digits than its factorization.

256205664826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44681949.

The product of its (nonzero) digits is 8294400, while the sum is 52.

The spelling of 256205664826 in words is "two hundred fifty-six billion, two hundred five million, six hundred sixty-four thousand, eight hundred twenty-six".