129143436611029 has 4 divisors (see below), whose sum is σ = 129509282040876. Its totient is φ = 128777591181184.

The previous prime is 129143436611017. The next prime is 129143436611099. The reversal of 129143436611029 is 920116634341921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96817275538929 + 32326161072100 = 9839577^2 + 5685610^2 .

It is a cyclic number.

It is not a de Polignac number, because 129143436611029 - 2¹⁷ = 129143436479957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129143436611099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182922714394 + ... + 182922715099.

It is an arithmetic number, because the mean of its divisors is an integer number (32377320510219).

Almost surely, 2^{129143436611029} is an apocalyptic number.

It is an amenable number.

129143436611029 is a deficient number, since it is larger than the sum of its proper divisors (365845429847).

129143436611029 is an equidigital number, since it uses as much as digits as its factorization.

129143436611029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365845429846.

The product of its (nonzero) digits is 1679616, while the sum is 52.

The spelling of 129143436611029 in words is "one hundred twenty-nine trillion, one hundred forty-three billion, four hundred thirty-six million, six hundred eleven thousand, twenty-nine".