129585897728 has 144 divisors (see below), whose sum is σ = 308531825280. Its totient is φ = 53144813568.

The previous prime is 129585897713. The next prime is 129585897737. The reversal of 129585897728 is 827798585921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5861351 + ... + 5883417.

It is an arithmetic number, because the mean of its divisors is an integer number (2142582120).

Almost surely, 2^129585897728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129585897728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154265912640).

129585897728 is an abundant number, since it is smaller than the sum of its proper divisors (178945927552).

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

129585897728 is a wasteful number, since it uses less digits than its factorization.

129585897728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22232 (or 22218 counting only the distinct ones).

The product of its digits is 203212800, while the sum is 71.

The spelling of 129585897728 in words is "one hundred twenty-nine billion, five hundred eighty-five million, eight hundred ninety-seven thousand, seven hundred twenty-eight".