9744564161 has 2 divisors, whose sum is σ = 9744564162. Its totient is φ = 9744564160.

The previous prime is 9744564107. The next prime is 9744564197. The reversal of 9744564161 is 1614654479.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7708840000 + 2035724161 = 87800^2 + 45119^2 .

It is an emirp because it is prime and its reverse (1614654479) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9744564161 - 2¹⁸ = 9744302017 is a prime.

It is not a weakly prime, because it can be changed into another prime (9744564461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4872282080 + 4872282081.

It is an arithmetic number, because the mean of its divisors is an integer number (4872282081).

Almost surely, 2^9744564161 is an apocalyptic number.

It is an amenable number.

9744564161 is a deficient number, since it is larger than the sum of its proper divisors (1).

9744564161 is an equidigital number, since it uses as much as digits as its factorization.

9744564161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 9744564161 is about 98714.5590123362. The cubic root of 9744564161 is about 2135.9322502118.

The spelling of 9744564161 in words is "nine billion, seven hundred forty-four million, five hundred sixty-four thousand, one hundred sixty-one".