129139113128796 has 144 divisors (see below), whose sum is σ = 341539877427840. Its totient is φ = 41099518755840.

The previous prime is 129139113128747. The next prime is 129139113128867. The reversal of 129139113128796 is 697821311931921.

129139113128796 is a `hidden beast` number, since 1 + 2 + 9 + 1 + 391 + 131 + 28 + 7 + 96 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

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 47 ways as a sum of consecutive naturals, for example, 917651830 + ... + 917792546.

It is an arithmetic number, because the mean of its divisors is an integer number (2371804704360).

Almost surely, 2^{129139113128796} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129139113128796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170769938713920).

129139113128796 is an abundant number, since it is smaller than the sum of its proper divisors (212400764299044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129139113128796 is a wasteful number, since it uses less digits than its factorization.

129139113128796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154044 (or 154039 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 63.

The spelling of 129139113128796 in words is "one hundred twenty-nine trillion, one hundred thirty-nine billion, one hundred thirteen million, one hundred twenty-eight thousand, seven hundred ninety-six".