9665094489551 has 2 divisors, whose sum is σ = 9665094489552. Its totient is φ = 9665094489550.

The previous prime is 9665094489529. The next prime is 9665094489553. The reversal of 9665094489551 is 1559844905669.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1559844905669) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9665094489551 - 2⁶ = 9665094489487 is a prime.

Together with 9665094489553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9665094489553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832547244775 + 4832547244776.

It is an arithmetic number, because the mean of its divisors is an integer number (4832547244776).

Almost surely, 2^{9665094489551} is an apocalyptic number.

9665094489551 is a deficient number, since it is larger than the sum of its proper divisors (1).

9665094489551 is an equidigital number, since it uses as much as digits as its factorization.

9665094489551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904000, while the sum is 71.

The spelling of 9665094489551 in words is "nine trillion, six hundred sixty-five billion, ninety-four million, four hundred eighty-nine thousand, five hundred fifty-one".