129444512200 has 24 divisors (see below), whose sum is σ = 300958491330. Its totient is φ = 51777804800.

The previous prime is 129444512177. The next prime is 129444512203. The reversal of 129444512200 is 2215444921.

It can be written as a sum of positive squares in 3 ways, for example, as 91043406756 + 38401105444 = 301734^2 + 195962^2 .

It is not an unprimeable number, because it can be changed into a prime (129444512203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 323611081 + ... + 323611480.

Almost surely, 2^129444512200 is an apocalyptic number.

129444512200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129444512200 is an abundant number, since it is smaller than the sum of its proper divisors (171513979130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129444512200 is a wasteful number, since it uses less digits than its factorization.

129444512200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647222577 (or 647222568 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 129444512200 in words is "one hundred twenty-nine billion, four hundred forty-four million, five hundred twelve thousand, two hundred".