129500844228 has 144 divisors (see below), whose sum is σ = 403157260800. Its totient is φ = 35806639680.

The previous prime is 129500844203. The next prime is 129500844251. The reversal of 129500844228 is 822448005921.

129500844228 is a `hidden beast` number, since 1 + 2 + 9 + 500 + 84 + 42 + 28 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 230643 + ... + 558746.

It is an arithmetic number, because the mean of its divisors is an integer number (2799703200).

Almost surely, 2^129500844228 is an apocalyptic number.

129500844228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

129500844228 is an abundant number, since it is smaller than the sum of its proper divisors (273656416572).

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

129500844228 is a wasteful number, since it uses less digits than its factorization.

129500844228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789447 (or 789432 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 129500844228 in words is "one hundred twenty-nine billion, five hundred million, eight hundred forty-four thousand, two hundred twenty-eight".