129209326770 has 32 divisors (see below), whose sum is σ = 310223844288. Its totient is φ = 34442324928.

The previous prime is 129209326723. The next prime is 129209326787. The reversal of 129209326770 is 77623902921.

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, 765484 + ... + 918903.

It is an arithmetic number, because the mean of its divisors is an integer number (9694495134).

Almost surely, 2^129209326770 is an apocalyptic number.

129209326770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129209326770 is an abundant number, since it is smaller than the sum of its proper divisors (181014517518).

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

129209326770 is a wasteful number, since it uses less digits than its factorization.

129209326770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686954.

The product of its (nonzero) digits is 571536, while the sum is 48.

The spelling of 129209326770 in words is "one hundred twenty-nine billion, two hundred nine million, three hundred twenty-six thousand, seven hundred seventy".