129833165891 has 24 divisors (see below), whose sum is σ = 153765151680. Its totient is φ = 108895374720.

The previous prime is 129833165857. The next prime is 129833165921. The reversal of 129833165891 is 198561338921.

It is a happy number.

It is not a de Polignac number, because 129833165891 - 2¹⁸ = 129832903747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129833165491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3225095 + ... + 3265103.

It is an arithmetic number, because the mean of its divisors is an integer number (6406881320).

Almost surely, 2^129833165891 is an apocalyptic number.

129833165891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129833165891 is a deficient number, since it is larger than the sum of its proper divisors (23931985789).

129833165891 is a wasteful number, since it uses less digits than its factorization.

129833165891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42107 (or 42096 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 56.

The spelling of 129833165891 in words is "one hundred twenty-nine billion, eight hundred thirty-three million, one hundred sixty-five thousand, eight hundred ninety-one".