9619882561 has 3 divisors (see below), whose sum is σ = 9619980643. Its totient is φ = 9619784480.

The previous prime is 9619882541. The next prime is 9619882631. The reversal of 9619882561 is 1652889169.

The square root of 9619882561 is 98081.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1652889169 = 43 ⋅38439283.

It can be written as a sum of positive squares in only one way, i.e., 326922561 + 9292960000 = 18081^2 + 96400^2 .

It is not a de Polignac number, because 9619882561 - 2⁹ = 9619882049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9619882541) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 49041 + ... + 147121.

Almost surely, 2^9619882561 is an apocalyptic number.

9619882561 is the 98081-st square number.

9619882561 is the 49041-st centered octagonal number.

It is an amenable number.

9619882561 is a deficient number, since it is larger than the sum of its proper divisors (98082).

9619882561 is an frugal number, since it uses more digits than its factorization.

9619882561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196162 (or 98081 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 55.

The cubic root of 9619882561 is about 2126.7833747720.

The spelling of 9619882561 in words is "nine billion, six hundred nineteen million, eight hundred eighty-two thousand, five hundred sixty-one".