8311623172649 has 2 divisors, whose sum is σ = 8311623172650. Its totient is φ = 8311623172648.

The previous prime is 8311623172609. The next prime is 8311623172651. The reversal of 8311623172649 is 9462713261138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7444750449049 + 866872723600 = 2728507^2 + 931060^2 .

It is a cyclic number.

It is not a de Polignac number, because 8311623172649 - 2⁴⁰ = 7212111544873 is a prime.

Together with 8311623172651, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8311623172649.

It is not a weakly prime, because it can be changed into another prime (8311623172609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4155811586324 + 4155811586325.

It is an arithmetic number, because the mean of its divisors is an integer number (4155811586325).

Almost surely, 2^{8311623172649} is an apocalyptic number.

It is an amenable number.

8311623172649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8311623172649 is an equidigital number, since it uses as much as digits as its factorization.

8311623172649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 53.

The spelling of 8311623172649 in words is "eight trillion, three hundred eleven billion, six hundred twenty-three million, one hundred seventy-two thousand, six hundred forty-nine".