129863911680 has 864 divisors, whose sum is σ = 502210800000. Its totient is φ = 30841896960.

The previous prime is 129863911669. The next prime is 129863911703. The reversal of 129863911680 is 86119368921.

129863911680 is a `hidden beast` number, since 1 + 2 + 98 + 6 + 391 + 168 + 0 = 666.

129863911680 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 260248071 + ... + 260248569.

It is an arithmetic number, because the mean of its divisors is an integer number (581262500).

Almost surely, 2^129863911680 is an apocalyptic number.

129863911680 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 129863911680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251105400000).

129863911680 is an abundant number, since it is smaller than the sum of its proper divisors (372346888320).

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

129863911680 is a wasteful number, since it uses less digits than its factorization.

129863911680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 129863911680 in words is "one hundred twenty-nine billion, eight hundred sixty-three million, nine hundred eleven thousand, six hundred eighty".