255605761 has 12 divisors (see below), whose sum is σ = 272144448. Its totient is φ = 240022592.

The previous prime is 255605747. The next prime is 255605783. The reversal of 255605761 is 167506552.

It is not a de Polignac number, because 255605761 - 2⁹ = 255605249 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 255605761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255605741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186300 + ... + 187666.

It is an arithmetic number, because the mean of its divisors is an integer number (22678704).

Almost surely, 2^255605761 is an apocalyptic number.

It is an amenable number.

255605761 is a deficient number, since it is larger than the sum of its proper divisors (16538687).

255605761 is a wasteful number, since it uses less digits than its factorization.

255605761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048 (or 2031 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 255605761 is about 15987.6752844183. The cubic root of 255605761 is about 634.6343078031.

The spelling of 255605761 in words is "two hundred fifty-five million, six hundred five thousand, seven hundred sixty-one".