129532638204 has 36 divisors (see below), whose sum is σ = 327619915896. Its totient is φ = 43152465888.

The previous prime is 129532638163. The next prime is 129532638211. The reversal of 129532638204 is 402836235921.

129532638204 is a `hidden beast` number, since 1 + 2 + 9 + 5 + 3 + 2 + 638 + 2 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 129532638204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 982119 + ... + 1106174.

Almost surely, 2^129532638204 is an apocalyptic number.

It is an amenable number.

129532638204 is an abundant number, since it is smaller than the sum of its proper divisors (198087277692).

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

129532638204 is a wasteful number, since it uses less digits than its factorization.

129532638204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090026 (or 2090021 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 129532638204 in words is "one hundred twenty-nine billion, five hundred thirty-two million, six hundred thirty-eight thousand, two hundred four".