4545678609 has 20 divisors (see below), whose sum is σ = 6792595876. Its totient is φ = 3029498496.

The previous prime is 4545678593. The next prime is 4545678629. The reversal of 4545678609 is 9068765454.

It can be written as a sum of positive squares in 2 ways, for example, as 900900225 + 3644778384 = 30015^2 + 60372^2 .

It is not a de Polignac number, because 4545678609 - 2⁴ = 4545678593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4545678629) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 329637 + ... + 343149.

Almost surely, 2^4545678609 is an apocalyptic number.

It is an amenable number.

4545678609 is a deficient number, since it is larger than the sum of its proper divisors (2246917267).

4545678609 is a wasteful number, since it uses less digits than its factorization.

4545678609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17678 (or 17669 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The square root of 4545678609 is about 67421.6479255736. The cubic root of 4545678609 is about 1656.5310304679.

The spelling of 4545678609 in words is "four billion, five hundred forty-five million, six hundred seventy-eight thousand, six hundred nine".