129139113128805 has 96 divisors (see below), whose sum is σ = 241506823574016. Its totient is φ = 63458323264512.

The previous prime is 129139113128747. The next prime is 129139113128867. The reversal of 129139113128805 is 508821311931921.

129139113128805 is a `hidden beast` number, since 1 + 29 + 1 + 391 + 131 + 28 + 80 + 5 = 666.

It is not a de Polignac number, because 129139113128805 - 2²⁰ = 129139112080229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1045573684 + ... + 1045697186.

It is an arithmetic number, because the mean of its divisors is an integer number (2515696078896).

Almost surely, 2^{129139113128805} is an apocalyptic number.

129139113128805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129139113128805 is a deficient number, since it is larger than the sum of its proper divisors (112367710445211).

129139113128805 is a wasteful number, since it uses less digits than its factorization.

129139113128805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126827 (or 126824 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 54.

The spelling of 129139113128805 in words is "one hundred twenty-nine trillion, one hundred thirty-nine billion, one hundred thirteen million, one hundred twenty-eight thousand, eight hundred five".