9645659941 has 2 divisors, whose sum is σ = 9645659942. Its totient is φ = 9645659940.

The previous prime is 9645659923. The next prime is 9645659957. The reversal of 9645659941 is 1499565469.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7858822500 + 1786837441 = 88650^2 + 42271^2 .

It is an emirp because it is prime and its reverse (1499565469) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9645659941 - 2¹⁷ = 9645528869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9645657941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4822829970 + 4822829971.

It is an arithmetic number, because the mean of its divisors is an integer number (4822829971).

Almost surely, 2^9645659941 is an apocalyptic number.

It is an amenable number.

9645659941 is a deficient number, since it is larger than the sum of its proper divisors (1).

9645659941 is an equidigital number, since it uses as much as digits as its factorization.

9645659941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10497600, while the sum is 58.

The square root of 9645659941 is about 98212.3207189404. The cubic root of 9645659941 is about 2128.6813192268.

The spelling of 9645659941 in words is "nine billion, six hundred forty-five million, six hundred fifty-nine thousand, nine hundred forty-one".