255909605 has 12 divisors (see below), whose sum is σ = 357229260. Its totient is φ = 175480704.

The previous prime is 255909593. The next prime is 255909611. The reversal of 255909605 is 506909552.

It can be written as a sum of positive squares in 2 ways, for example, as 134050084 + 121859521 = 11578^2 + 11039^2 .

It is not a de Polignac number, because 255909605 - 2⁶ = 255909541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 522020 + ... + 522509.

It is an arithmetic number, because the mean of its divisors is an integer number (29769105).

Almost surely, 2^255909605 is an apocalyptic number.

It is an amenable number.

255909605 is a deficient number, since it is larger than the sum of its proper divisors (101319655).

255909605 is a wasteful number, since it uses less digits than its factorization.

255909605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044548 (or 1044541 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 41.

The square root of 255909605 is about 15997.1749068390. The cubic root of 255909605 is about 634.8856759900.

The spelling of 255909605 in words is "two hundred fifty-five million, nine hundred nine thousand, six hundred five".