505551066550 has 12 divisors (see below), whose sum is σ = 940324983876. Its totient is φ = 202220426600.

The previous prime is 505551066487. The next prime is 505551066563. The reversal of 505551066550 is 55660155505.

It is a junction number, because it is equal to n+sod(n) for n = 505551066497 and 505551066506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5055510616 + ... + 5055510715.

It is an arithmetic number, because the mean of its divisors is an integer number (78360415323).

Almost surely, 2^505551066550 is an apocalyptic number.

505551066550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

505551066550 is a deficient number, since it is larger than the sum of its proper divisors (434773917326).

505551066550 is a wasteful number, since it uses less digits than its factorization.

505551066550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10111021343 (or 10111021338 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 43.

The spelling of 505551066550 in words is "five hundred five billion, five hundred fifty-one million, sixty-six thousand, five hundred fifty".