129053321280 has 840 divisors, whose sum is σ = 526639014792. Its totient is φ = 29881073664.

The previous prime is 129053321269. The next prime is 129053321281. The reversal of 129053321280 is 82123350921.

129053321280 is a `hidden beast` number, since 1 + 2 + 9 + 0 + 53 + 321 + 280 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 57969229824 + 71084091456 = 240768^2 + 266616^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (129053321281) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 74467294 + ... + 74469026.

Almost surely, 2^129053321280 is an apocalyptic number.

129053321280 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 129053321280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263319507396).

129053321280 is an abundant number, since it is smaller than the sum of its proper divisors (397585693512).

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

129053321280 is a wasteful number, since it uses less digits than its factorization.

129053321280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805 (or 1773 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 129053321280 in words is "one hundred twenty-nine billion, fifty-three million, three hundred twenty-one thousand, two hundred eighty".