129326989611 has 4 divisors (see below), whose sum is σ = 172435986152. Its totient is φ = 86217993072.

The previous prime is 129326989523. The next prime is 129326989621. The reversal of 129326989611 is 116989623921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 116989623921 = 3 ⋅38996541307.

It is not a de Polignac number, because 129326989611 - 2¹⁴ = 129326973227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129326989621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21554498266 + ... + 21554498271.

It is an arithmetic number, because the mean of its divisors is an integer number (43108996538).

Almost surely, 2^129326989611 is an apocalyptic number.

129326989611 is a deficient number, since it is larger than the sum of its proper divisors (43108996541).

129326989611 is an equidigital number, since it uses as much as digits as its factorization.

129326989611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43108996540.

The product of its digits is 2519424, while the sum is 57.

The spelling of 129326989611 in words is "one hundred twenty-nine billion, three hundred twenty-six million, nine hundred eighty-nine thousand, six hundred eleven".