8071717649 has 2 divisors, whose sum is σ = 8071717650. Its totient is φ = 8071717648.

The previous prime is 8071717531. The next prime is 8071717663. The reversal of 8071717649 is 9467171708.

8071717649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6745665424 + 1326052225 = 82132^2 + 36415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8071717649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8071717597 and 8071717606.

It is not a weakly prime, because it can be changed into another prime (8071717699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4035858824 + 4035858825.

It is an arithmetic number, because the mean of its divisors is an integer number (4035858825).

Almost surely, 2^8071717649 is an apocalyptic number.

It is an amenable number.

8071717649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8071717649 is an equidigital number, since it uses as much as digits as its factorization.

8071717649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 50.

The square root of 8071717649 is about 89842.7384322183. The cubic root of 8071717649 is about 2005.9587000659.

The spelling of 8071717649 in words is "eight billion, seventy-one million, seven hundred seventeen thousand, six hundred forty-nine".