505911664 has 20 divisors (see below), whose sum is σ = 981711720. Its totient is φ = 252566720.

The previous prime is 505911629. The next prime is 505911667. The reversal of 505911664 is 466119505.

It is a super-2 number, since 2×505911664² = 511893223542497792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505911667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13447 + ... + 34534.

It is an arithmetic number, because the mean of its divisors is an integer number (49085586).

Almost surely, 2^505911664 is an apocalyptic number.

It is an amenable number.

505911664 is a deficient number, since it is larger than the sum of its proper divisors (475800056).

505911664 is a wasteful number, since it uses less digits than its factorization.

505911664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48648 (or 48642 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 505911664 is about 22492.4801656020. The cubic root of 505911664 is about 796.8163388503.

The spelling of 505911664 in words is "five hundred five million, nine hundred eleven thousand, six hundred sixty-four".