55527218489 has 2 divisors, whose sum is σ = 55527218490. Its totient is φ = 55527218488.

The previous prime is 55527218479. The next prime is 55527218491. The reversal of 55527218489 is 98481272555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44692074025 + 10835144464 = 211405^2 + 104092^2 .

It is a cyclic number.

It is not a de Polignac number, because 55527218489 - 2³² = 51232251193 is a prime.

It is a Sophie Germain prime.

Together with 55527218491, 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 (55527218479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27763609244 + 27763609245.

It is an arithmetic number, because the mean of its divisors is an integer number (27763609245).

Almost surely, 2^55527218489 is an apocalyptic number.

It is an amenable number.

55527218489 is a deficient number, since it is larger than the sum of its proper divisors (1).

55527218489 is an equidigital number, since it uses as much as digits as its factorization.

55527218489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064000, while the sum is 56.

The spelling of 55527218489 in words is "fifty-five billion, five hundred twenty-seven million, two hundred eighteen thousand, four hundred eighty-nine".