505510664 has 8 divisors (see below), whose sum is σ = 947832510. Its totient is φ = 252755328.

The previous prime is 505510633. The next prime is 505510667. The reversal of 505510664 is 466015505.

It can be written as a sum of positive squares in only one way, i.e., 315346564 + 190164100 = 17758^2 + 13790^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 505510664.

It is not an unprimeable number, because it can be changed into a prime (505510667) by changing a digit.

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 as a sum of consecutive naturals, namely, 31594409 + ... + 31594424.

Almost surely, 2^505510664 is an apocalyptic number.

It is an amenable number.

505510664 is a deficient number, since it is larger than the sum of its proper divisors (442321846).

505510664 is a wasteful number, since it uses less digits than its factorization.

505510664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63188839 (or 63188835 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 505510664 is about 22483.5643081785. The cubic root of 505510664 is about 796.6057567580.

The spelling of 505510664 in words is "five hundred five million, five hundred ten thousand, six hundred sixty-four".