871351728640457 has 2 divisors, whose sum is σ = 871351728640458. Its totient is φ = 871351728640456.

The previous prime is 871351728640451. The next prime is 871351728640469. The reversal of 871351728640457 is 754046827153178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 816853611583801 + 54498117056656 = 28580651^2 + 7382284^2 .

It is a cyclic number.

It is not a de Polignac number, because 871351728640457 - 2¹⁰ = 871351728639433 is a prime.

It is a super-2 number, since 2×871351728640457² (a number of 31 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (871351728640451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435675864320228 + 435675864320229.

It is an arithmetic number, because the mean of its divisors is an integer number (435675864320229).

Almost surely, 2^{871351728640457} is an apocalyptic number.

It is an amenable number.

871351728640457 is a deficient number, since it is larger than the sum of its proper divisors (1).

871351728640457 is an equidigital number, since it uses as much as digits as its factorization.

871351728640457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 316108800, while the sum is 68.

The spelling of 871351728640457 in words is "eight hundred seventy-one trillion, three hundred fifty-one billion, seven hundred twenty-eight million, six hundred forty thousand, four hundred fifty-seven".