129406208015 has 16 divisors (see below), whose sum is σ = 183591074880. Its totient is φ = 85675833600.

The previous prime is 129406208003. The next prime is 129406208069. The reversal of 129406208015 is 510802604921.

It is not a de Polignac number, because 129406208015 - 2¹⁶ = 129406142479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129406208015.

It is a congruent number.

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, 63745886 + ... + 63747915.

It is an arithmetic number, because the mean of its divisors is an integer number (11474442180).

Almost surely, 2^129406208015 is an apocalyptic number.

129406208015 is a deficient number, since it is larger than the sum of its proper divisors (54184866865).

129406208015 is a wasteful number, since it uses less digits than its factorization.

129406208015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127493842.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 129406208015 in words is "one hundred twenty-nine billion, four hundred six million, two hundred eight thousand, fifteen".