129050804162809 has 9 divisors (see below), whose sum is σ = 129987497025477. Its totient is φ = 128120813423964.

The previous prime is 129050804162801. The next prime is 129050804162827. The reversal of 129050804162809 is 908261408050921.

The square root of 129050804162809 is 11360053.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 129050804162809 - 2³ = 129050804162801 is a prime.

It is a super-2 number, since 2×129050804162809² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129050804162809.

It is not an unprimeable number, because it can be changed into a prime (129050804162801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1579006504 + ... + 1579088230.

It is an arithmetic number, because the mean of its divisors is an integer number (14443055225053).

Almost surely, 2^{129050804162809} is an apocalyptic number.

129050804162809 is the 11360053-rd square number.

129050804162809 is the 5680027-th centered octagonal number.

It is an amenable number.

129050804162809 is a deficient number, since it is larger than the sum of its proper divisors (936692862668).

129050804162809 is an frugal number, since it uses more digits than its factorization.

129050804162809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163732 (or 81866 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 129050804162809 in words is "one hundred twenty-nine trillion, fifty billion, eight hundred four million, one hundred sixty-two thousand, eight hundred nine".