871718687401 has 2 divisors, whose sum is σ = 871718687402. Its totient is φ = 871718687400.

The previous prime is 871718687239. The next prime is 871718687473. The reversal of 871718687401 is 104786817178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 813425413801 + 58293273600 = 901901^2 + 241440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871718687401 is a prime.

It is a super-2 number, since 2×871718687401² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (871718687701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435859343700 + 435859343701.

It is an arithmetic number, because the mean of its divisors is an integer number (435859343701).

Almost surely, 2^871718687401 is an apocalyptic number.

It is an amenable number.

871718687401 is a deficient number, since it is larger than the sum of its proper divisors (1).

871718687401 is an equidigital number, since it uses as much as digits as its factorization.

871718687401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4214784, while the sum is 58.

The spelling of 871718687401 in words is "eight hundred seventy-one billion, seven hundred eighteen million, six hundred eighty-seven thousand, four hundred one".