129516799804 has 72 divisors (see below), whose sum is σ = 272396597760. Its totient is φ = 53670808800.

The previous prime is 129516799771. The next prime is 129516799831. The reversal of 129516799804 is 408997615921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7641219 + ... + 7658149.

It is an arithmetic number, because the mean of its divisors is an integer number (3783286080).

Almost surely, 2^129516799804 is an apocalyptic number.

129516799804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129516799804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136198298880).

129516799804 is an abundant number, since it is smaller than the sum of its proper divisors (142879797956).

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

129516799804 is a wasteful number, since it uses less digits than its factorization.

129516799804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18239 (or 18230 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 61.

The spelling of 129516799804 in words is "one hundred twenty-nine billion, five hundred sixteen million, seven hundred ninety-nine thousand, eight hundred four".