129061536864 has 96 divisors (see below), whose sum is σ = 380710036224. Its totient is φ = 37984657920.

The previous prime is 129061536833. The next prime is 129061536869. The reversal of 129061536864 is 468635160921.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129061536869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2219442 + ... + 2276849.

It is an arithmetic number, because the mean of its divisors is an integer number (3965729544).

Almost surely, 2^129061536864 is an apocalyptic number.

It is an amenable number.

129061536864 is an abundant number, since it is smaller than the sum of its proper divisors (251648499360).

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

129061536864 is a wasteful number, since it uses less digits than its factorization.

129061536864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4496340 (or 4496332 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 129061536864 in words is "one hundred twenty-nine billion, sixty-one million, five hundred thirty-six thousand, eight hundred sixty-four".