55456553209 has 2 divisors, whose sum is σ = 55456553210. Its totient is φ = 55456553208.

The previous prime is 55456553149. The next prime is 55456553261. The reversal of 55456553209 is 90235565455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43286050809 + 12170502400 = 208053^2 + 110320^2 .

It is a cyclic number.

It is not a de Polignac number, because 55456553209 - 2¹⁷ = 55456422137 is a prime.

It is not a weakly prime, because it can be changed into another prime (55456550209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27728276604 + 27728276605.

It is an arithmetic number, because the mean of its divisors is an integer number (27728276605).

Almost surely, 2^55456553209 is an apocalyptic number.

It is an amenable number.

55456553209 is a deficient number, since it is larger than the sum of its proper divisors (1).

55456553209 is an equidigital number, since it uses as much as digits as its factorization.

55456553209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050000, while the sum is 49.

The spelling of 55456553209 in words is "fifty-five billion, four hundred fifty-six million, five hundred fifty-three thousand, two hundred nine".