129188830680 has 384 divisors, whose sum is σ = 520717317120. Its totient is φ = 27048453120.

The previous prime is 129188830637. The next prime is 129188830691. The reversal of 129188830680 is 86038881921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4276509 + ... + 4306611.

It is an arithmetic number, because the mean of its divisors is an integer number (1356034680).

Almost surely, 2^129188830680 is an apocalyptic number.

129188830680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129188830680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260358658560).

129188830680 is an abundant number, since it is smaller than the sum of its proper divisors (391528486440).

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

129188830680 is a wasteful number, since it uses less digits than its factorization.

129188830680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30271 (or 30264 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The spelling of 129188830680 in words is "one hundred twenty-nine billion, one hundred eighty-eight million, eight hundred thirty thousand, six hundred eighty".