129396804912 has 80 divisors (see below), whose sum is σ = 380475752160. Its totient is φ = 42080256000.

The previous prime is 129396804857. The next prime is 129396804913. The reversal of 129396804912 is 219408693921.

129396804912 is a `hidden beast` number, since 1 + 2 + 93 + 9 + 68 + 0 + 491 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (129396804913) 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, 3635089 + ... + 3670512.

It is an arithmetic number, because the mean of its divisors is an integer number (4755946902).

Almost surely, 2^129396804912 is an apocalyptic number.

129396804912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129396804912 is an abundant number, since it is smaller than the sum of its proper divisors (251078947248).

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

129396804912 is a wasteful number, since it uses less digits than its factorization.

129396804912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7305659 (or 7305647 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 129396804912 in words is "one hundred twenty-nine billion, three hundred ninety-six million, eight hundred four thousand, nine hundred twelve".