9815999730323 has 2 divisors, whose sum is σ = 9815999730324. Its totient is φ = 9815999730322.

The previous prime is 9815999730239. The next prime is 9815999730391. The reversal of 9815999730323 is 3230379995189.

It is an a-pointer prime, because the next prime (9815999730391) can be obtained adding 9815999730323 to its sum of digits (68).

It is a strong prime.

It is an emirp because it is prime and its reverse (3230379995189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9815999730323 - 2³² = 9811704763027 is a prime.

It is not a weakly prime, because it can be changed into another prime (9815999738323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4907999865161 + 4907999865162.

It is an arithmetic number, because the mean of its divisors is an integer number (4907999865162).

Almost surely, 2^{9815999730323} is an apocalyptic number.

9815999730323 is a deficient number, since it is larger than the sum of its proper divisors (1).

9815999730323 is an equidigital number, since it uses as much as digits as its factorization.

9815999730323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 99202320, while the sum is 68.

The spelling of 9815999730323 in words is "nine trillion, eight hundred fifteen billion, nine hundred ninety-nine million, seven hundred thirty thousand, three hundred twenty-three".