4613509561 has 4 divisors (see below), whose sum is σ = 4613885172. Its totient is φ = 4613133952.

The previous prime is 4613509531. The next prime is 4613509577. The reversal of 4613509561 is 1659053164.

It is a happy number.

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 4389857536 + 223652025 = 66256^2 + 14955^2 .

It is a cyclic number.

It is not a de Polignac number, because 4613509561 - 2¹⁵ = 4613476793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4613509531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168736 + ... + 194161.

It is an arithmetic number, because the mean of its divisors is an integer number (1153471293).

Almost surely, 2^4613509561 is an apocalyptic number.

It is an amenable number.

4613509561 is a deficient number, since it is larger than the sum of its proper divisors (375611).

4613509561 is a wasteful number, since it uses less digits than its factorization.

4613509561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375610.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 4613509561 is about 67922.8206201715. The cubic root of 4613509561 is about 1664.7300089168.

The spelling of 4613509561 in words is "four billion, six hundred thirteen million, five hundred nine thousand, five hundred sixty-one".