129297833280 has 1792 divisors, whose sum is σ = 613072281600. Its totient is φ = 24843386880.

The previous prime is 129297833243. The next prime is 129297833303. The reversal of 129297833280 is 82338792921.

129297833280 is a `hidden beast` number, since 1 + 29 + 297 + 8 + 3 + 328 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 669936864 + ... + 669937056.

Almost surely, 2^129297833280 is an apocalyptic number.

129297833280 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 129297833280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306536140800).

129297833280 is an abundant number, since it is smaller than the sum of its proper divisors (483774448320).

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

129297833280 is a wasteful number, since it uses less digits than its factorization.

129297833280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 129297833280 in words is "one hundred twenty-nine billion, two hundred ninety-seven million, eight hundred thirty-three thousand, two hundred eighty".