500661565550 has 48 divisors (see below), whose sum is σ = 933188990832. Its totient is φ = 199843814400.

The previous prime is 500661565543. The next prime is 500661565553. The reversal of 500661565550 is 55565166005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500661565553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85419620 + ... + 85425480.

It is an arithmetic number, because the mean of its divisors is an integer number (19441437309).

Almost surely, 2^500661565550 is an apocalyptic number.

500661565550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

500661565550 is a deficient number, since it is larger than the sum of its proper divisors (432527425282).

500661565550 is a wasteful number, since it uses less digits than its factorization.

500661565550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9173 (or 9168 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 500661565550 in words is "five hundred billion, six hundred sixty-one million, five hundred sixty-five thousand, five hundred fifty".