129868037066856 has 192 divisors, whose sum is σ = 377900782963200. Its totient is φ = 37059437796480.

The previous prime is 129868037066821. The next prime is 129868037066857. The reversal of 129868037066856 is 658660730868921.

It is not an unprimeable number, because it can be changed into a prime (129868037066857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2167371 + ... + 16261413.

It is an arithmetic number, because the mean of its divisors is an integer number (1968233244600).

Almost surely, 2^{129868037066856} 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 129868037066856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188950391481600).

129868037066856 is an abundant number, since it is smaller than the sum of its proper divisors (248032745896344).

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

129868037066856 is a wasteful number, since it uses less digits than its factorization.

129868037066856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14094260 (or 14094245 counting only the distinct ones).

The product of its (nonzero) digits is 1254113280, while the sum is 75.

The spelling of 129868037066856 in words is "one hundred twenty-nine trillion, eight hundred sixty-eight billion, thirty-seven million, sixty-six thousand, eight hundred fifty-six".