129513535720 has 32 divisors (see below), whose sum is σ = 306742586400. Its totient is φ = 49078813248.

The previous prime is 129513535699. The next prime is 129513535729. The reversal of 129513535720 is 27535315921.

It is not an unprimeable number, because it can be changed into a prime (129513535729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85205514 + ... + 85207033.

It is an arithmetic number, because the mean of its divisors is an integer number (9585705825).

Almost surely, 2^129513535720 is an apocalyptic number.

129513535720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129513535720 is an abundant number, since it is smaller than the sum of its proper divisors (177229050680).

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

129513535720 is a wasteful number, since it uses less digits than its factorization.

129513535720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170412577 (or 170412573 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 43.

The spelling of 129513535720 in words is "one hundred twenty-nine billion, five hundred thirteen million, five hundred thirty-five thousand, seven hundred twenty".