9645448369 has 2 divisors, whose sum is σ = 9645448370. Its totient is φ = 9645448368.

The previous prime is 9645448361. The next prime is 9645448391. The reversal of 9645448369 is 9638445469.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7719379600 + 1926068769 = 87860^2 + 43887^2 .

It is an emirp because it is prime and its reverse (9638445469) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9645448369 - 2³ = 9645448361 is a prime.

It is a super-2 number, since 2×9645448369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9645448361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4822724184 + 4822724185.

It is an arithmetic number, because the mean of its divisors is an integer number (4822724185).

Almost surely, 2^9645448369 is an apocalyptic number.

It is an amenable number.

9645448369 is a deficient number, since it is larger than the sum of its proper divisors (1).

9645448369 is an equidigital number, since it uses as much as digits as its factorization.

9645448369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22394880, while the sum is 58.

The square root of 9645448369 is about 98211.2435976655. The cubic root of 9645448369 is about 2128.6657553131.

The spelling of 9645448369 in words is "nine billion, six hundred forty-five million, four hundred forty-eight thousand, three hundred sixty-nine".