505664163 has 24 divisors (see below), whose sum is σ = 751587408. Its totient is φ = 327367872.

The previous prime is 505664153. The next prime is 505664179. The reversal of 505664163 is 361466505.

505664163 is a `hidden beast` number, since 5 + 0 + 5 + 6 + 641 + 6 + 3 = 666.

It is not a de Polignac number, because 505664163 - 2⁹ = 505663651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505664113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224320 + ... + 226562.

It is an arithmetic number, because the mean of its divisors is an integer number (31316142).

Almost surely, 2^505664163 is an apocalyptic number.

505664163 is a deficient number, since it is larger than the sum of its proper divisors (245923245).

505664163 is a wasteful number, since it uses less digits than its factorization.

505664163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2963 (or 2960 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 505664163 is about 22486.9776315093. The cubic root of 505664163 is about 796.6863787384.

The spelling of 505664163 in words is "five hundred five million, six hundred sixty-four thousand, one hundred sixty-three".