505005505509 has 8 divisors (see below), whose sum is σ = 673368236320. Its totient is φ = 336656555856.

The previous prime is 505005505493. The next prime is 505005505517. The reversal of 505005505509 is 905505500505.

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

It is not a de Polignac number, because 505005505509 - 2⁴ = 505005505493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505005507509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3359479 + ... + 3506580.

It is an arithmetic number, because the mean of its divisors is an integer number (84171029540).

Almost surely, 2^505005505509 is an apocalyptic number.

It is an amenable number.

505005505509 is a deficient number, since it is larger than the sum of its proper divisors (168362730811).

505005505509 is a wasteful number, since it uses less digits than its factorization.

505005505509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6890579.

The product of its (nonzero) digits is 140625, while the sum is 39.

The spelling of 505005505509 in words is "five hundred five billion, five million, five hundred five thousand, five hundred nine".