505168985 has 8 divisors (see below), whose sum is σ = 606444360. Its totient is φ = 403974144.

The previous prime is 505168949. The next prime is 505168997. The reversal of 505168985 is 589861505.

505168985 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 51308569 + 453860416 = 7163^2 + 21304^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505168985 - 2⁶ = 505168921 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5342 + ... + 32231.

It is an arithmetic number, because the mean of its divisors is an integer number (75805545).

Almost surely, 2^505168985 is an apocalyptic number.

It is an amenable number.

505168985 is a deficient number, since it is larger than the sum of its proper divisors (101275375).

505168985 is a wasteful number, since it uses less digits than its factorization.

505168985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40267.

The product of its (nonzero) digits is 432000, while the sum is 47.

The square root of 505168985 is about 22475.9646066637. The cubic root of 505168985 is about 796.4262387482.

The spelling of 505168985 in words is "five hundred five million, one hundred sixty-eight thousand, nine hundred eighty-five".