505223406663 has 4 divisors (see below), whose sum is σ = 673631208888. Its totient is φ = 336815604440.

The previous prime is 505223406641. The next prime is 505223406673. The reversal of 505223406663 is 366604322505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505223406663 - 2²⁰ = 505222358087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505223406673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84203901108 + ... + 84203901113.

It is an arithmetic number, because the mean of its divisors is an integer number (168407802222).

Almost surely, 2^505223406663 is an apocalyptic number.

505223406663 is a deficient number, since it is larger than the sum of its proper divisors (168407802225).

505223406663 is a wasteful number, since it uses less digits than its factorization.

505223406663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168407802224.

The product of its (nonzero) digits is 777600, while the sum is 42.

The spelling of 505223406663 in words is "five hundred five billion, two hundred twenty-three million, four hundred six thousand, six hundred sixty-three".