129232816323 has 16 divisors (see below), whose sum is σ = 193633117440. Its totient is φ = 76070152224.

The previous prime is 129232816309. The next prime is 129232816333. The reversal of 129232816323 is 323618232921.

It is a happy number.

It is not a de Polignac number, because 129232816323 - 2⁵ = 129232816291 is a prime.

It is a super-2 number, since 2×129232816323² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129232816333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72035233 + ... + 72037026.

It is an arithmetic number, because the mean of its divisors is an integer number (12102069840).

Almost surely, 2^129232816323 is an apocalyptic number.

129232816323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

129232816323 is a deficient number, since it is larger than the sum of its proper divisors (64400301117).

129232816323 is a wasteful number, since it uses less digits than its factorization.

129232816323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144072298.

The product of its digits is 186624, while the sum is 42.

The spelling of 129232816323 in words is "one hundred twenty-nine billion, two hundred thirty-two million, eight hundred sixteen thousand, three hundred twenty-three".