129098438128 has 20 divisors (see below), whose sum is σ = 272867153688. Its totient is φ = 58681108160.

The previous prime is 129098438093. The next prime is 129098438143. The reversal of 129098438128 is 821834890921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366756751 + ... + 366757102.

Almost surely, 2^129098438128 is an apocalyptic number.

It is an amenable number.

129098438128 is an abundant number, since it is smaller than the sum of its proper divisors (143768715560).

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

129098438128 is a wasteful number, since it uses less digits than its factorization.

129098438128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733513872 (or 733513866 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 129098438128 in words is "one hundred twenty-nine billion, ninety-eight million, four hundred thirty-eight thousand, one hundred twenty-eight".