129451469181 has 16 divisors (see below), whose sum is σ = 182573609856. Its totient is φ = 81417954816.

The previous prime is 129451469141. The next prime is 129451469197. The reversal of 129451469181 is 181964154921.

It is not a de Polignac number, because 129451469181 - 2⁷ = 129451469053 is a prime.

It is a super-2 number, since 2×129451469181² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129451469141) 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, 12845020 + ... + 12855093.

It is an arithmetic number, because the mean of its divisors is an integer number (11410850616).

Almost surely, 2^129451469181 is an apocalyptic number.

It is an amenable number.

129451469181 is a deficient number, since it is larger than the sum of its proper divisors (53122140675).

129451469181 is a wasteful number, since it uses less digits than its factorization.

129451469181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25700212.

The product of its digits is 622080, while the sum is 51.

The spelling of 129451469181 in words is "one hundred twenty-nine billion, four hundred fifty-one million, four hundred sixty-nine thousand, one hundred eighty-one".