509555220050 has 54 divisors (see below), whose sum is σ = 955333669743. Its totient is φ = 202208891040.

The previous prime is 509555220047. The next prime is 509555220079. The reversal of 509555220050 is 50022555905.

It can be written as a sum of positive squares in 5 ways, for example, as 88630648681 + 420924571369 = 297709^2 + 648787^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=504755.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 509555219986 and 509555220013.

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 26 ways as a sum of consecutive naturals, for example, 792465029 + ... + 792465671.

Almost surely, 2^509555220050 is an apocalyptic number.

509555220050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

509555220050 is a deficient number, since it is larger than the sum of its proper divisors (445778449693).

509555220050 is an frugal number, since it uses more digits than its factorization.

509555220050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612 (or 807 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 38.

Adding to 509555220050 its reverse (50022555905), we get a palindrome (559577775955).

The spelling of 509555220050 in words is "five hundred nine billion, five hundred fifty-five million, two hundred twenty thousand, fifty".