129534127998 has 128 divisors (see below), whose sum is σ = 300283822080. Its totient is φ = 36889776000.

The previous prime is 129534127993. The next prime is 129534128011. The reversal of 129534127998 is 899721435921.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129534127993) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9726168 + ... + 9739476.

It is an arithmetic number, because the mean of its divisors is an integer number (2345967360).

Almost surely, 2^129534127998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129534127998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150141911040).

129534127998 is an abundant number, since it is smaller than the sum of its proper divisors (170749694082).

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

129534127998 is a wasteful number, since it uses less digits than its factorization.

129534127998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13494.

The product of its digits is 9797760, while the sum is 60.

The spelling of 129534127998 in words is "one hundred twenty-nine billion, five hundred thirty-four million, one hundred twenty-seven thousand, nine hundred ninety-eight".