129136656165 has 16 divisors (see below), whose sum is σ = 225402163776. Its totient is φ = 62611712000.

The previous prime is 129136656151. The next prime is 129136656167. The reversal of 129136656165 is 561656631921.

It is a happy number.

It is not a de Polignac number, because 129136656165 - 2²⁸ = 128868220709 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129136656167) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 391323036 + ... + 391323365.

It is an arithmetic number, because the mean of its divisors is an integer number (14087635236).

Almost surely, 2^129136656165 is an apocalyptic number.

129136656165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129136656165 is a deficient number, since it is larger than the sum of its proper divisors (96265507611).

129136656165 is a wasteful number, since it uses less digits than its factorization.

129136656165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782646420.

The product of its digits is 1749600, while the sum is 51.

The spelling of 129136656165 in words is "one hundred twenty-nine billion, one hundred thirty-six million, six hundred fifty-six thousand, one hundred sixty-five".