505505009551 has 8 divisors (see below), whose sum is σ = 507941409600. Its totient is φ = 503072737440.

The previous prime is 505505009543. The next prime is 505505009573. The reversal of 505505009551 is 155900505505.

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

It is a cyclic number.

It is not a de Polignac number, because 505505009551 - 2³ = 505505009543 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 (505505009591) 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, 786336 + ... + 1276453.

It is an arithmetic number, because the mean of its divisors is an integer number (63492676200).

Almost surely, 2^505505009551 is an apocalyptic number.

505505009551 is a deficient number, since it is larger than the sum of its proper divisors (2436400049).

505505009551 is a wasteful number, since it uses less digits than its factorization.

505505009551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063969.

The product of its (nonzero) digits is 140625, while the sum is 40.

The spelling of 505505009551 in words is "five hundred five billion, five hundred five million, nine thousand, five hundred fifty-one".