256226661423 has 16 divisors (see below), whose sum is σ = 379693118560. Its totient is φ = 170773645248.

The previous prime is 256226661349. The next prime is 256226661461. The reversal of 256226661423 is 324166622652.

256226661423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256226661423 - 2¹⁰ = 256226660399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256226661473) 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 15 ways as a sum of consecutive naturals, for example, 1119190 + ... + 1328547.

It is an arithmetic number, because the mean of its divisors is an integer number (23730819910).

Almost surely, 2^256226661423 is an apocalyptic number.

256226661423 is a deficient number, since it is larger than the sum of its proper divisors (123466457137).

256226661423 is a wasteful number, since it uses less digits than its factorization.

256226661423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451623 (or 2451617 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The spelling of 256226661423 in words is "two hundred fifty-six billion, two hundred twenty-six million, six hundred sixty-one thousand, four hundred twenty-three".