129187766871 has 24 divisors (see below), whose sum is σ = 186855337760. Its totient is φ = 86009527296.

The previous prime is 129187766837. The next prime is 129187766893. The reversal of 129187766871 is 178667781921.

It is not a de Polignac number, because 129187766871 - 2¹⁵ = 129187734103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129187766799 and 129187766808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129187766801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29205966 + ... + 29210388.

Almost surely, 2^129187766871 is an apocalyptic number.

129187766871 is a deficient number, since it is larger than the sum of its proper divisors (57667570889).

129187766871 is a wasteful number, since it uses less digits than its factorization.

129187766871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8055 (or 8052 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 63.

The spelling of 129187766871 in words is "one hundred twenty-nine billion, one hundred eighty-seven million, seven hundred sixty-six thousand, eight hundred seventy-one".