255995811 has 12 divisors (see below), whose sum is σ = 375291592. Its totient is φ = 168116256.

The previous prime is 255995801. The next prime is 255995827. The reversal of 255995811 is 118599552.

255995811 is a `hidden beast` number, since 2 + 5 + 599 + 58 + 1 + 1 = 666.

It is not a de Polignac number, because 255995811 - 2¹⁰ = 255994787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255995801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211666 + ... + 212871.

Almost surely, 2^255995811 is an apocalyptic number.

255995811 is a deficient number, since it is larger than the sum of its proper divisors (119295781).

255995811 is a wasteful number, since it uses less digits than its factorization.

255995811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424610 (or 424607 counting only the distinct ones).

The product of its digits is 162000, while the sum is 45.

The square root of 255995811 is about 15999.8690932145. The cubic root of 255995811 is about 634.9569574231.

The spelling of 255995811 in words is "two hundred fifty-five million, nine hundred ninety-five thousand, eight hundred eleven".