256258773 has 12 divisors (see below), whose sum is σ = 370930560. Its totient is φ = 170479656.

The previous prime is 256258753. The next prime is 256258777. The reversal of 256258773 is 377852652.

256258773 is a `hidden beast` number, since 2 + 5 + 62 + 587 + 7 + 3 = 666.

It is not a de Polignac number, because 256258773 - 2¹³ = 256250581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256258777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25411 + ... + 34032.

It is an arithmetic number, because the mean of its divisors is an integer number (30910880).

Almost surely, 2^256258773 is an apocalyptic number.

It is an amenable number.

256258773 is a deficient number, since it is larger than the sum of its proper divisors (114671787).

256258773 is a wasteful number, since it uses less digits than its factorization.

256258773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59928 (or 59925 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 256258773 is about 16008.0846137194. The cubic root of 256258773 is about 635.1742948505.

The spelling of 256258773 in words is "two hundred fifty-six million, two hundred fifty-eight thousand, seven hundred seventy-three".