55005505055509 has 2 divisors, whose sum is σ = 55005505055510. Its totient is φ = 55005505055508.

The previous prime is 55005505055503. The next prime is 55005505055551. The reversal of 55005505055509 is 90555050550055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49482431640625 + 5523073414884 = 7034375^2 + 2350122^2 .

It is a cyclic number.

It is not a de Polignac number, because 55005505055509 - 2²⁵ = 55005471501077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55005505055503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27502752527754 + 27502752527755.

It is an arithmetic number, because the mean of its divisors is an integer number (27502752527755).

Almost surely, 2^{55005505055509} is an apocalyptic number.

It is an amenable number.

55005505055509 is a deficient number, since it is larger than the sum of its proper divisors (1).

55005505055509 is an equidigital number, since it uses as much as digits as its factorization.

55005505055509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3515625, while the sum is 49.

The spelling of 55005505055509 in words is "fifty-five trillion, five billion, five hundred five million, fifty-five thousand, five hundred nine".