63545609 has 6 divisors (see below), whose sum is σ = 67503774. Its totient is φ = 59807360.

The previous prime is 63545597. The next prime is 63545617. The reversal of 63545609 is 90654536.

It can be written as a sum of positive squares in 3 ways, for example, as 38093584 + 25452025 = 6172^2 + 5045^2 .

It is not a de Polignac number, because 63545609 - 2⁸ = 63545353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63545809) 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 5 ways as a sum of consecutive naturals, for example, 109652 + ... + 110229.

It is an arithmetic number, because the mean of its divisors is an integer number (11250629).

Almost surely, 2^63545609 is an apocalyptic number.

It is an amenable number.

63545609 is a deficient number, since it is larger than the sum of its proper divisors (3958165).

63545609 is a wasteful number, since it uses less digits than its factorization.

63545609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219915 (or 219898 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 63545609 is about 7971.5499747540. The cubic root of 63545609 is about 399.0511028488.

The spelling of 63545609 in words is "sixty-three million, five hundred forty-five thousand, six hundred nine".