505653663 has 8 divisors (see below), whose sum is σ = 674641408. Its totient is φ = 336884184.

The previous prime is 505653647. The next prime is 505653667. The reversal of 505653663 is 366356505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505653663 - 2⁴ = 505653647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505653667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49081 + ... + 58482.

It is an arithmetic number, because the mean of its divisors is an integer number (84330176).

Almost surely, 2^505653663 is an apocalyptic number.

505653663 is a deficient number, since it is larger than the sum of its proper divisors (168987745).

505653663 is a wasteful number, since it uses less digits than its factorization.

505653663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109133.

The product of its (nonzero) digits is 243000, while the sum is 39.

The square root of 505653663 is about 22486.7441618390. The cubic root of 505653663 is about 796.6808643638.

The spelling of 505653663 in words is "five hundred five million, six hundred fifty-three thousand, six hundred sixty-three".