256273051449 has 16 divisors (see below), whose sum is σ = 342737619840. Its totient is φ = 170328839040.

The previous prime is 256273051381. The next prime is 256273051451. The reversal of 256273051449 is 944150372652.

It is not a de Polignac number, because 256273051449 - 2⁹ = 256273050937 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256273051398 and 256273051407.

It is not an unprimeable number, because it can be changed into a prime (256273052449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4448469 + ... + 4505709.

It is an arithmetic number, because the mean of its divisors is an integer number (21421101240).

Almost surely, 2^256273051449 is an apocalyptic number.

It is an amenable number.

256273051449 is a deficient number, since it is larger than the sum of its proper divisors (86464568391).

256273051449 is a wasteful number, since it uses less digits than its factorization.

256273051449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61760.

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 256273051449 in words is "two hundred fifty-six billion, two hundred seventy-three million, fifty-one thousand, four hundred forty-nine".