871296677861 has 2 divisors, whose sum is σ = 871296677862. Its totient is φ = 871296677860.

The previous prime is 871296677851. The next prime is 871296677947. The reversal of 871296677861 is 168776692178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 868204650625 + 3092027236 = 931775^2 + 55606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871296677861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 871296677791 and 871296677800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871296677821) 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, 435648338930 + 435648338931.

It is an arithmetic number, because the mean of its divisors is an integer number (435648338931).

Almost surely, 2^871296677861 is an apocalyptic number.

It is an amenable number.

871296677861 is a deficient number, since it is larger than the sum of its proper divisors (1).

871296677861 is an equidigital number, since it uses as much as digits as its factorization.

871296677861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85349376, while the sum is 68.

The spelling of 871296677861 in words is "eight hundred seventy-one billion, two hundred ninety-six million, six hundred seventy-seven thousand, eight hundred sixty-one".