129273840000 has 640 divisors, whose sum is σ = 482464936800. Its totient is φ = 34062336000.

The previous prime is 129273839987. The next prime is 129273840029. The reversal of 129273840000 is 48372921.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 209519692 + ... + 209520308.

Almost surely, 2^129273840000 is an apocalyptic number.

129273840000 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 129273840000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241232468400).

129273840000 is an abundant number, since it is smaller than the sum of its proper divisors (353191096800).

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

129273840000 is an frugal number, since it uses more digits than its factorization.

129273840000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 129273840000 in words is "one hundred twenty-nine billion, two hundred seventy-three million, eight hundred forty thousand".