129394555290 has 864 divisors, whose sum is σ = 483991417728. Its totient is φ = 23710579200.

The previous prime is 129394555253. The next prime is 129394555343. The reversal of 129394555290 is 92555493921.

129394555290 is a `hidden beast` number, since 1 + 29 + 3 + 94 + 5 + 5 + 529 + 0 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 159548985 + ... + 159549795.

It is an arithmetic number, because the mean of its divisors is an integer number (560175252).

Almost surely, 2^129394555290 is an apocalyptic number.

129394555290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129394555290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241995708864).

129394555290 is an abundant number, since it is smaller than the sum of its proper divisors (354596862438).

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

129394555290 is a wasteful number, since it uses less digits than its factorization.

129394555290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 54.

The spelling of 129394555290 in words is "one hundred twenty-nine billion, three hundred ninety-four million, five hundred fifty-five thousand, two hundred ninety".