55505555489 has 2 divisors, whose sum is σ = 55505555490. Its totient is φ = 55505555488.

The previous prime is 55505555377. The next prime is 55505555491. The reversal of 55505555489 is 98455550555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32029187089 + 23476368400 = 178967^2 + 153220^2 .

It is a cyclic number.

It is not a de Polignac number, because 55505555489 - 2⁸ = 55505555233 is a prime.

It is a Sophie Germain prime.

Together with 55505555491, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55505555089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27752777744 + 27752777745.

It is an arithmetic number, because the mean of its divisors is an integer number (27752777745).

Almost surely, 2^55505555489 is an apocalyptic number.

It is an amenable number.

55505555489 is a deficient number, since it is larger than the sum of its proper divisors (1).

55505555489 is an equidigital number, since it uses as much as digits as its factorization.

55505555489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500000, while the sum is 56.

The spelling of 55505555489 in words is "fifty-five billion, five hundred five million, five hundred fifty-five thousand, four hundred eighty-nine".