255982689 has 12 divisors (see below), whose sum is σ = 371797972. Its totient is φ = 169711200.

The previous prime is 255982637. The next prime is 255982693. The reversal of 255982689 is 986289552.

255982689 is a `hidden beast` number, since 2 + 559 + 8 + 2 + 6 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 95707089 + 160275600 = 9783^2 + 12660^2 .

It is not a de Polignac number, because 255982689 - 2⁷ = 255982561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255981689) 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, 76942 + ... + 80199.

Almost surely, 2^255982689 is an apocalyptic number.

It is an amenable number.

255982689 is a deficient number, since it is larger than the sum of its proper divisors (115815283).

255982689 is a wasteful number, since it uses less digits than its factorization.

255982689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157328 (or 157325 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The square root of 255982689 is about 15999.4590221045. The cubic root of 255982689 is about 634.9461082253.

The spelling of 255982689 in words is "two hundred fifty-five million, nine hundred eighty-two thousand, six hundred eighty-nine".