671322271517 has 2 divisors, whose sum is σ = 671322271518. Its totient is φ = 671322271516.

The previous prime is 671322271469. The next prime is 671322271553. The reversal of 671322271517 is 715172223176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 351442666276 + 319879605241 = 592826^2 + 565579^2 .

It is a cyclic number.

It is not a de Polignac number, because 671322271517 - 2⁶ = 671322271453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671322277517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335661135758 + 335661135759.

It is an arithmetic number, because the mean of its divisors is an integer number (335661135759).

Almost surely, 2^671322271517 is an apocalyptic number.

It is an amenable number.

671322271517 is a deficient number, since it is larger than the sum of its proper divisors (1).

671322271517 is an equidigital number, since it uses as much as digits as its factorization.

671322271517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246960, while the sum is 44.

The spelling of 671322271517 in words is "six hundred seventy-one billion, three hundred twenty-two million, two hundred seventy-one thousand, five hundred seventeen".