505555505650 has 24 divisors (see below), whose sum is σ = 1012666568004. Its totient is φ = 186666648000.

The previous prime is 505555505647. The next prime is 505555505677. The reversal of 505555505650 is 56505555505.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 30557487249 + 474998018401 = 174807^2 + 689201^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 505555505650.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 388888201 + ... + 388889500.

Almost surely, 2^505555505650 is an apocalyptic number.

505555505650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

505555505650 is an abundant number, since it is smaller than the sum of its proper divisors (507111062354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505555505650 is a wasteful number, since it uses less digits than its factorization.

505555505650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777777726 (or 777777721 counting only the distinct ones).

The product of its (nonzero) digits is 2343750, while the sum is 46.

The spelling of 505555505650 in words is "five hundred five billion, five hundred fifty-five million, five hundred five thousand, six hundred fifty".