545456609 has 4 divisors (see below), whose sum is σ = 545572116. Its totient is φ = 545341104.

The previous prime is 545456603. The next prime is 545456623. The reversal of 545456609 is 906654545.

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 296700625 + 248755984 = 17225^2 + 15772^2 .

It is a cyclic number.

It is not a de Polignac number, because 545456609 - 2²⁸ = 277021153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 545456609.

It is not an unprimeable number, because it can be changed into a prime (545456603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50354 + ... + 60219.

It is an arithmetic number, because the mean of its divisors is an integer number (136393029).

Almost surely, 2^545456609 is an apocalyptic number.

It is an amenable number.

545456609 is a deficient number, since it is larger than the sum of its proper divisors (115507).

545456609 is a wasteful number, since it uses less digits than its factorization.

545456609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115506.

The product of its (nonzero) digits is 648000, while the sum is 44.

The square root of 545456609 is about 23355.0125026727. The cubic root of 545456609 is about 817.0589709974.

The spelling of 545456609 in words is "five hundred forty-five million, four hundred fifty-six thousand, six hundred nine".