871426051081 has 2 divisors, whose sum is σ = 871426051082. Its totient is φ = 871426051080.

The previous prime is 871426051051. The next prime is 871426051091. The reversal of 871426051081 is 180150624178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 870972361081 + 453690000 = 933259^2 + 21300^2 .

It is a cyclic number.

It is not a de Polignac number, because 871426051081 - 2¹⁷ = 871425920009 is a prime.

It is a super-2 number, since 2×871426051081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (871426051051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435713025540 + 435713025541.

It is an arithmetic number, because the mean of its divisors is an integer number (435713025541).

Almost surely, 2^871426051081 is an apocalyptic number.

It is an amenable number.

871426051081 is a deficient number, since it is larger than the sum of its proper divisors (1).

871426051081 is an equidigital number, since it uses as much as digits as its factorization.

871426051081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 43.

The spelling of 871426051081 in words is "eight hundred seventy-one billion, four hundred twenty-six million, fifty-one thousand, eighty-one".