129643036856 has 16 divisors (see below), whose sum is σ = 245231852400. Its totient is φ = 64247876224.

The previous prime is 129643036837. The next prime is 129643036933. The reversal of 129643036856 is 658630346921.

129643036856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 129643036798 and 129643036807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71704316 + ... + 71706123.

It is an arithmetic number, because the mean of its divisors is an integer number (15326990775).

Almost surely, 2^129643036856 is an apocalyptic number.

It is an amenable number.

129643036856 is a deficient number, since it is larger than the sum of its proper divisors (115588815544).

129643036856 is a wasteful number, since it uses less digits than its factorization.

129643036856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143410558 (or 143410554 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 53.

The spelling of 129643036856 in words is "one hundred twenty-nine billion, six hundred forty-three million, thirty-six thousand, eight hundred fifty-six".