255646261 has 8 divisors (see below), whose sum is σ = 276411744. Its totient is φ = 235038000.

The previous prime is 255646253. The next prime is 255646271. The reversal of 255646261 is 162646552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255646261 - 2³ = 255646253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255646261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255646201) 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 7 ways as a sum of consecutive naturals, for example, 35911 + ... + 42436.

It is an arithmetic number, because the mean of its divisors is an integer number (34551468).

Almost surely, 2^255646261 is an apocalyptic number.

It is an amenable number.

255646261 is a deficient number, since it is larger than the sum of its proper divisors (20765483).

255646261 is a wasteful number, since it uses less digits than its factorization.

255646261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78611.

The product of its digits is 86400, while the sum is 37.

The square root of 255646261 is about 15988.9418349058. The cubic root of 255646261 is about 634.6678246952.

The spelling of 255646261 in words is "two hundred fifty-five million, six hundred forty-six thousand, two hundred sixty-one".