129069256915 has 16 divisors (see below), whose sum is σ = 167441202720. Its totient is φ = 95177099520.

The previous prime is 129069256909. The next prime is 129069256931. The reversal of 129069256915 is 519652960921.

It is not a de Polignac number, because 129069256915 - 2¹⁵ = 129069224147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18356266 + ... + 18363295.

It is an arithmetic number, because the mean of its divisors is an integer number (10465075170).

Almost surely, 2^129069256915 is an apocalyptic number.

129069256915 is a deficient number, since it is larger than the sum of its proper divisors (38371945805).

129069256915 is a wasteful number, since it uses less digits than its factorization.

129069256915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36719622.

The product of its (nonzero) digits is 2624400, while the sum is 55.

The spelling of 129069256915 in words is "one hundred twenty-nine billion, sixty-nine million, two hundred fifty-six thousand, nine hundred fifteen".