255708561 has 16 divisors (see below), whose sum is σ = 347428224. Its totient is φ = 167255424.

The previous prime is 255708547. The next prime is 255708599. The reversal of 255708561 is 165807552.

It is not a de Polignac number, because 255708561 - 2⁹ = 255708049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255703561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40180 + ... + 46106.

It is an arithmetic number, because the mean of its divisors is an integer number (21714264).

Almost surely, 2^255708561 is an apocalyptic number.

It is an amenable number.

255708561 is a deficient number, since it is larger than the sum of its proper divisors (91719663).

255708561 is a wasteful number, since it uses less digits than its factorization.

255708561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6200.

The product of its (nonzero) digits is 84000, while the sum is 39.

The square root of 255708561 is about 15990.8899377114. The cubic root of 255708561 is about 634.7193758683.

The spelling of 255708561 in words is "two hundred fifty-five million, seven hundred eight thousand, five hundred sixty-one".