8121871514663 has 2 divisors, whose sum is σ = 8121871514664. Its totient is φ = 8121871514662.

The previous prime is 8121871514569. The next prime is 8121871514761. The reversal of 8121871514663 is 3664151781218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8121871514663 - 2¹⁶ = 8121871449127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8121871514363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060935757331 + 4060935757332.

It is an arithmetic number, because the mean of its divisors is an integer number (4060935757332).

Almost surely, 2^{8121871514663} is an apocalyptic number.

8121871514663 is a deficient number, since it is larger than the sum of its proper divisors (1).

8121871514663 is an equidigital number, since it uses as much as digits as its factorization.

8121871514663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 53.

The spelling of 8121871514663 in words is "eight trillion, one hundred twenty-one billion, eight hundred seventy-one million, five hundred fourteen thousand, six hundred sixty-three".