55000489171 has 2 divisors, whose sum is σ = 55000489172. Its totient is φ = 55000489170.

The previous prime is 55000489169. The next prime is 55000489183. The reversal of 55000489171 is 17198400055.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55000489171 - 2¹ = 55000489169 is a prime.

Together with 55000489169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55000489121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27500244585 + 27500244586.

It is an arithmetic number, because the mean of its divisors is an integer number (27500244586).

Almost surely, 2^55000489171 is an apocalyptic number.

55000489171 is a deficient number, since it is larger than the sum of its proper divisors (1).

55000489171 is an equidigital number, since it uses as much as digits as its factorization.

55000489171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 40.

The spelling of 55000489171 in words is "fifty-five billion, four hundred eighty-nine thousand, one hundred seventy-one".