50000555509 has 2 divisors, whose sum is σ = 50000555510. Its totient is φ = 50000555508.

The previous prime is 50000555489. The next prime is 50000555573. The reversal of 50000555509 is 90555500005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40795112484 + 9205443025 = 201978^2 + 95945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50000555509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50000555809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25000277754 + 25000277755.

It is an arithmetic number, because the mean of its divisors is an integer number (25000277755).

Almost surely, 2^50000555509 is an apocalyptic number.

It is an amenable number.

50000555509 is a deficient number, since it is larger than the sum of its proper divisors (1).

50000555509 is an equidigital number, since it uses as much as digits as its factorization.

50000555509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28125, while the sum is 34.

The spelling of 50000555509 in words is "fifty billion, five hundred fifty-five thousand, five hundred nine".