129509455089 has 16 divisors (see below), whose sum is σ = 199845816320. Its totient is φ = 73068624720.

The previous prime is 129509455057. The next prime is 129509455093. The reversal of 129509455089 is 980554905921.

It is not a de Polignac number, because 129509455089 - 2⁵ = 129509455057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129509459089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39030727 + ... + 39034044.

It is an arithmetic number, because the mean of its divisors is an integer number (12490363520).

Almost surely, 2^129509455089 is an apocalyptic number.

It is an amenable number.

129509455089 is a deficient number, since it is larger than the sum of its proper divisors (70336361231).

129509455089 is an equidigital number, since it uses as much as digits as its factorization.

129509455089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78064860.

The product of its (nonzero) digits is 5832000, while the sum is 57.

The spelling of 129509455089 in words is "one hundred twenty-nine billion, five hundred nine million, four hundred fifty-five thousand, eighty-nine".