129506929545 has 64 divisors (see below), whose sum is σ = 245721079296. Its totient is φ = 57009070080.

The previous prime is 129506929529. The next prime is 129506929547. The reversal of 129506929545 is 545929605921.

It is a happy number.

It is not a de Polignac number, because 129506929545 - 2⁴ = 129506929529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129506929547) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 205015 + ... + 548675.

It is an arithmetic number, because the mean of its divisors is an integer number (3839391864).

Almost surely, 2^129506929545 is an apocalyptic number.

129506929545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129506929545 is a deficient number, since it is larger than the sum of its proper divisors (116214149751).

129506929545 is a wasteful number, since it uses less digits than its factorization.

129506929545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343810.

The product of its (nonzero) digits is 8748000, while the sum is 57.

The spelling of 129506929545 in words is "one hundred twenty-nine billion, five hundred six million, nine hundred twenty-nine thousand, five hundred forty-five".