9665311841 has 2 divisors, whose sum is σ = 9665311842. Its totient is φ = 9665311840.

The previous prime is 9665311807. The next prime is 9665311847. The reversal of 9665311841 is 1481135669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5559193600 + 4106118241 = 74560^2 + 64079^2 .

It is a cyclic number.

It is not a de Polignac number, because 9665311841 - 2¹⁴ = 9665295457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9665311792 and 9665311801.

It is not a weakly prime, because it can be changed into another prime (9665311847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832655920 + 4832655921.

It is an arithmetic number, because the mean of its divisors is an integer number (4832655921).

Almost surely, 2^9665311841 is an apocalyptic number.

It is an amenable number.

9665311841 is a deficient number, since it is larger than the sum of its proper divisors (1).

9665311841 is an equidigital number, since it uses as much as digits as its factorization.

9665311841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The square root of 9665311841 is about 98312.3178497995. The cubic root of 9665311841 is about 2130.1259846720.

The spelling of 9665311841 in words is "nine billion, six hundred sixty-five million, three hundred eleven thousand, eight hundred forty-one".