5817271912721 has 2 divisors, whose sum is σ = 5817271912722. Its totient is φ = 5817271912720.

The previous prime is 5817271912589. The next prime is 5817271912741. The reversal of 5817271912721 is 1272191727185.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5720635486225 + 96636426496 = 2391785^2 + 310864^2 .

It is a cyclic number.

It is not a de Polignac number, because 5817271912721 - 2²⁶ = 5817204803857 is a prime.

It is not a weakly prime, because it can be changed into another prime (5817271912741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2908635956360 + 2908635956361.

It is an arithmetic number, because the mean of its divisors is an integer number (2908635956361).

Almost surely, 2^{5817271912721} is an apocalyptic number.

It is an amenable number.

5817271912721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5817271912721 is an equidigital number, since it uses as much as digits as its factorization.

5817271912721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 53.

The spelling of 5817271912721 in words is "five trillion, eight hundred seventeen billion, two hundred seventy-one million, nine hundred twelve thousand, seven hundred twenty-one".