255553785 has 20 divisors (see below), whose sum is σ = 458104548. Its totient is φ = 136295136.

The previous prime is 255553777. The next prime is 255553847. The reversal of 255553785 is 587355552.

255553785 is a `hidden beast` number, since 25 + 5 + 553 + 78 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 47155689 + 208398096 = 6867^2 + 14436^2 .

It is not a de Polignac number, because 255553785 - 2³ = 255553777 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 255553785.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 315094 + ... + 315903.

Almost surely, 2^255553785 is an apocalyptic number.

It is an amenable number.

255553785 is a deficient number, since it is larger than the sum of its proper divisors (202550763).

255553785 is an equidigital number, since it uses as much as digits as its factorization.

255553785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631014 (or 631005 counting only the distinct ones).

The product of its digits is 1050000, while the sum is 45.

The square root of 255553785 is about 15986.0496996600. The cubic root of 255553785 is about 634.5912884430.

The spelling of 255553785 in words is "two hundred fifty-five million, five hundred fifty-three thousand, seven hundred eighty-five".