255780585 has 80 divisors (see below), whose sum is σ = 484665984. Its totient is φ = 129330432.

The previous prime is 255780583. The next prime is 255780587. The reversal of 255780585 is 585087552.

255780585 is a `hidden beast` number, since 25 + 578 + 0 + 58 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (255780583) and next prime (255780587).

It is not a de Polignac number, because 255780585 - 2¹ = 255780583 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 255780585.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255780583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2263489 + ... + 2263601.

Almost surely, 2^255780585 is an apocalyptic number.

It is an amenable number.

255780585 is a deficient number, since it is larger than the sum of its proper divisors (228885399).

255780585 is an frugal number, since it uses more digits than its factorization.

255780585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 560000, while the sum is 45.

The square root of 255780585 is about 15993.1418114140. The cubic root of 255780585 is about 634.7789628929.

The spelling of 255780585 in words is "two hundred fifty-five million, seven hundred eighty thousand, five hundred eighty-five".