505665168 has 40 divisors (see below), whose sum is σ = 1307812128. Its totient is φ = 168360192.

The previous prime is 505665091. The next prime is 505665217. The reversal of 505665168 is 861566505.

It is a Cunningham number, because it is equal to 22487²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39355 + ... + 50597.

Almost surely, 2^505665168 is an apocalyptic number.

It is an amenable number.

505665168 is an abundant number, since it is smaller than the sum of its proper divisors (802146960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505665168 is a wasteful number, since it uses less digits than its factorization.

505665168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12191 (or 12185 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 505665168 is about 22486.9999777649. Note that the first 4 decimals coincide. The cubic root of 505665168 is about 796.6869065388.

The spelling of 505665168 in words is "five hundred five million, six hundred sixty-five thousand, one hundred sixty-eight".