505557663 has 16 divisors (see below), whose sum is σ = 731652096. Its totient is φ = 308659680.

The previous prime is 505557653. The next prime is 505557671. The reversal of 505557663 is 366755505.

It is a happy number.

It is not a de Polignac number, because 505557663 - 2²⁰ = 504509087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505557653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46083 + ... + 55988.

It is an arithmetic number, because the mean of its divisors is an integer number (45728256).

Almost surely, 2^505557663 is an apocalyptic number.

505557663 is a deficient number, since it is larger than the sum of its proper divisors (226094433).

505557663 is a wasteful number, since it uses less digits than its factorization.

505557663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102214.

The product of its (nonzero) digits is 472500, while the sum is 42.

The square root of 505557663 is about 22484.6094695905. The cubic root of 505557663 is about 796.6304436845.

The spelling of 505557663 in words is "five hundred five million, five hundred fifty-seven thousand, six hundred sixty-three".