55550545909 has 2 divisors, whose sum is σ = 55550545910. Its totient is φ = 55550545908.

The previous prime is 55550545877. The next prime is 55550545913. The reversal of 55550545909 is 90954505555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55544119684 + 6426225 = 235678^2 + 2535^2 .

It is a cyclic number.

It is not a de Polignac number, because 55550545909 - 2⁵ = 55550545877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55550545949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775272954 + 27775272955.

It is an arithmetic number, because the mean of its divisors is an integer number (27775272955).

Almost surely, 2^55550545909 is an apocalyptic number.

It is an amenable number.

55550545909 is a deficient number, since it is larger than the sum of its proper divisors (1).

55550545909 is an equidigital number, since it uses as much as digits as its factorization.

55550545909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5062500, while the sum is 52.

The spelling of 55550545909 in words is "fifty-five billion, five hundred fifty million, five hundred forty-five thousand, nine hundred nine".