55550510209 has 2 divisors, whose sum is σ = 55550510210. Its totient is φ = 55550510208.

The previous prime is 55550510177. The next prime is 55550510227. The reversal of 55550510209 is 90201505555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34436967184 + 21113543025 = 185572^2 + 145305^2 .

It is a cyclic number.

It is not a de Polignac number, because 55550510209 - 2⁵ = 55550510177 is a prime.

It is not a weakly prime, because it can be changed into another prime (55550510299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775255104 + 27775255105.

It is an arithmetic number, because the mean of its divisors is an integer number (27775255105).

Almost surely, 2^55550510209 is an apocalyptic number.

It is an amenable number.

55550510209 is a deficient number, since it is larger than the sum of its proper divisors (1).

55550510209 is an equidigital number, since it uses as much as digits as its factorization.

55550510209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56250, while the sum is 37.

The spelling of 55550510209 in words is "fifty-five billion, five hundred fifty million, five hundred ten thousand, two hundred nine".