505055005551 has 6 divisors (see below), whose sum is σ = 729523896920. Its totient is φ = 336703337028.

The previous prime is 505055005547. The next prime is 505055005589. The reversal of 505055005551 is 155500550505.

It is a happy number.

505055005551 is a `hidden beast` number, since 5 + 0 + 5 + 0 + 550 + 0 + 55 + 51 = 666.

It is not a de Polignac number, because 505055005551 - 2² = 505055005547 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 (505055009551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28058611411 + ... + 28058611428.

Almost surely, 2^505055005551 is an apocalyptic number.

505055005551 is a deficient number, since it is larger than the sum of its proper divisors (224468891369).

505055005551 is a wasteful number, since it uses less digits than its factorization.

505055005551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56117222845 (or 56117222842 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 36.

The spelling of 505055005551 in words is "five hundred five billion, fifty-five million, five thousand, five hundred fifty-one".