255748685 has 4 divisors (see below), whose sum is σ = 306898428. Its totient is φ = 204598944.

The previous prime is 255748681. The next prime is 255748733. The reversal of 255748685 is 586847552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114875524 + 140873161 = 10718^2 + 11869^2 .

It is a cyclic number.

It is not a de Polignac number, because 255748685 - 2² = 255748681 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 (255748681) 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 3 ways as a sum of consecutive naturals, for example, 25574864 + ... + 25574873.

It is an arithmetic number, because the mean of its divisors is an integer number (76724607).

Almost surely, 2^255748685 is an apocalyptic number.

It is an amenable number.

255748685 is a deficient number, since it is larger than the sum of its proper divisors (51149743).

255748685 is an equidigital number, since it uses as much as digits as its factorization.

255748685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51149742.

The product of its digits is 2688000, while the sum is 50.

The square root of 255748685 is about 15992.1444778366. The cubic root of 255748685 is about 634.7525727080.

The spelling of 255748685 in words is "two hundred fifty-five million, seven hundred forty-eight thousand, six hundred eighty-five".