256766273 has 16 divisors (see below), whose sum is σ = 284077056. Its totient is φ = 231232320.

The previous prime is 256766243. The next prime is 256766309. The reversal of 256766273 is 372667652.

It is a cyclic number.

It is not a de Polignac number, because 256766273 - 2¹⁶ = 256700737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256766243) 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, 21515 + ... + 31247.

It is an arithmetic number, because the mean of its divisors is an integer number (17754816).

Almost surely, 2^256766273 is an apocalyptic number.

256766273 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

256766273 is a deficient number, since it is larger than the sum of its proper divisors (27310783).

256766273 is a wasteful number, since it uses less digits than its factorization.

256766273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9824.

The product of its digits is 635040, while the sum is 44.

The square root of 256766273 is about 16023.9281388803. The cubic root of 256766273 is about 635.5933223150.

The spelling of 256766273 in words is "two hundred fifty-six million, seven hundred sixty-six thousand, two hundred seventy-three".