129791585280 has 704 divisors, whose sum is σ = 493889679360. Its totient is φ = 28476112896.

The previous prime is 129791585251. The next prime is 129791585281. The reversal of 129791585280 is 82585197921.

It is a self number, because there is not a number n which added to its sum of digits gives 129791585280.

It is not an unprimeable number, because it can be changed into a prime (129791585281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 309764911 + ... + 309765329.

It is an arithmetic number, because the mean of its divisors is an integer number (701547840).

Almost surely, 2^129791585280 is an apocalyptic number.

129791585280 is a gapful number since it is divisible by the number (10) 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 129791585280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246944839680).

129791585280 is an abundant number, since it is smaller than the sum of its proper divisors (364098094080).

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

129791585280 is a wasteful number, since it uses less digits than its factorization.

129791585280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 57.

The spelling of 129791585280 in words is "one hundred twenty-nine billion, seven hundred ninety-one million, five hundred eighty-five thousand, two hundred eighty".