545455109 has 4 divisors (see below), whose sum is σ = 545913516. Its totient is φ = 544996704.

The previous prime is 545455093. The next prime is 545455117. The reversal of 545455109 is 901554545.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103530625 + 441924484 = 10175^2 + 21022^2 .

It is a cyclic number.

It is not a de Polignac number, because 545455109 - 2⁴ = 545455093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545455409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227414 + ... + 229799.

It is an arithmetic number, because the mean of its divisors is an integer number (136478379).

Almost surely, 2^545455109 is an apocalyptic number.

It is an amenable number.

545455109 is a deficient number, since it is larger than the sum of its proper divisors (458407).

545455109 is a wasteful number, since it uses less digits than its factorization.

545455109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458406.

The product of its (nonzero) digits is 90000, while the sum is 38.

The square root of 545455109 is about 23354.9803896300. The cubic root of 545455109 is about 817.0582220288.

The spelling of 545455109 in words is "five hundred forty-five million, four hundred fifty-five thousand, one hundred nine".