9538207561 has 16 divisors (see below), whose sum is σ = 10523863440. Its totient is φ = 8604252160.

The previous prime is 9538207543. The next prime is 9538207573. The reversal of 9538207561 is 1657028359.

9538207561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 81812025 + 9456395536 = 9045^2 + 97244^2 .

It is not a de Polignac number, because 9538207561 - 2¹⁷ = 9538076489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9538207961) 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 15 ways as a sum of consecutive naturals, for example, 3070 + ... + 138151.

It is an arithmetic number, because the mean of its divisors is an integer number (657741465).

Almost surely, 2^9538207561 is an apocalyptic number.

It is an amenable number.

9538207561 is a deficient number, since it is larger than the sum of its proper divisors (985655879).

9538207561 is a wasteful number, since it uses less digits than its factorization.

9538207561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141404.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 9538207561 is about 97663.7474245178. The cubic root of 9538207561 is about 2120.7473009957.

The spelling of 9538207561 in words is "nine billion, five hundred thirty-eight million, two hundred seven thousand, five hundred sixty-one".