129868085136 has 40 divisors (see below), whose sum is σ = 335844709920. Its totient is φ = 43243922176.

The previous prime is 129868085119. The next prime is 129868085141. The reversal of 129868085136 is 631580868921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1373766 + ... + 1465253.

It is an arithmetic number, because the mean of its divisors is an integer number (8396117748).

Almost surely, 2^129868085136 is an apocalyptic number.

129868085136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129868085136 is an abundant number, since it is smaller than the sum of its proper divisors (205976624784).

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

129868085136 is a wasteful number, since it uses less digits than its factorization.

129868085136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839983 (or 2839977 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 129868085136 in words is "one hundred twenty-nine billion, eight hundred sixty-eight million, eighty-five thousand, one hundred thirty-six".