871063435138109 has 2 divisors, whose sum is σ = 871063435138110. Its totient is φ = 871063435138108.

The previous prime is 871063435138093. The next prime is 871063435138139. The reversal of 871063435138109 is 901831534360178.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497011512000025 + 374051923138084 = 22293755^2 + 19340422^2 .

It is a cyclic number.

It is not a de Polignac number, because 871063435138109 - 2⁴ = 871063435138093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871063435138139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435531717569054 + 435531717569055.

It is an arithmetic number, because the mean of its divisors is an integer number (435531717569055).

Almost surely, 2^{871063435138109} is an apocalyptic number.

It is an amenable number.

871063435138109 is a deficient number, since it is larger than the sum of its proper divisors (1).

871063435138109 is an equidigital number, since it uses as much as digits as its factorization.

871063435138109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 871063435138109 in words is "eight hundred seventy-one trillion, sixty-three billion, four hundred thirty-five million, one hundred thirty-eight thousand, one hundred nine".