129134209650 has 96 divisors (see below), whose sum is σ = 337552353600. Its totient is φ = 32580403200.

The previous prime is 129134209559. The next prime is 129134209651. The reversal of 129134209650 is 56902431921.

It is not an unprimeable number, because it can be changed into a prime (129134209651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2162190 + ... + 2221110.

It is an arithmetic number, because the mean of its divisors is an integer number (3516170350).

Almost surely, 2^129134209650 is an apocalyptic number.

129134209650 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 129134209650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168776176800).

129134209650 is an abundant number, since it is smaller than the sum of its proper divisors (208418143950).

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

129134209650 is a wasteful number, since it uses less digits than its factorization.

129134209650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59724 (or 59719 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 129134209650 in words is "one hundred twenty-nine billion, one hundred thirty-four million, two hundred nine thousand, six hundred fifty".