129535873830 has 192 divisors, whose sum is σ = 400086086400. Its totient is φ = 28723887360.

The previous prime is 129535873813. The next prime is 129535873853. The reversal of 129535873830 is 38378535921.

129535873830 is a `hidden beast` number, since 1 + 2 + 9 + 53 + 587 + 3 + 8 + 3 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 426757 + ... + 664223.

It is an arithmetic number, because the mean of its divisors is an integer number (2083781700).

Almost surely, 2^129535873830 is an apocalyptic number.

129535873830 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 129535873830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200043043200).

129535873830 is an abundant number, since it is smaller than the sum of its proper divisors (270550212570).

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

129535873830 is a wasteful number, since it uses less digits than its factorization.

129535873830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237539 (or 237536 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 129535873830 in words is "one hundred twenty-nine billion, five hundred thirty-five million, eight hundred seventy-three thousand, eight hundred thirty".