129475035500 has 96 divisors (see below), whose sum is σ = 286687564800. Its totient is φ = 51074712000.

The previous prime is 129475035463. The next prime is 129475035517. The reversal of 129475035500 is 5530574921.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50993231 + ... + 50995769.

It is an arithmetic number, because the mean of its divisors is an integer number (2986328800).

Almost surely, 2^129475035500 is an apocalyptic number.

129475035500 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 129475035500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143343782400).

129475035500 is an abundant number, since it is smaller than the sum of its proper divisors (157212529300).

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

129475035500 is a wasteful number, since it uses less digits than its factorization.

129475035500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928 (or 3916 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 41.

The spelling of 129475035500 in words is "one hundred twenty-nine billion, four hundred seventy-five million, thirty-five thousand, five hundred".