129409532916 has 24 divisors (see below), whose sum is σ = 302016120000. Its totient is φ = 43127861952.

The previous prime is 129409532897. The next prime is 129409532921. The reversal of 129409532916 is 619235904921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1018641 + ... + 1138616.

It is an arithmetic number, because the mean of its divisors is an integer number (12584005000).

Almost surely, 2^129409532916 is an apocalyptic number.

It is an amenable number.

129409532916 is an abundant number, since it is smaller than the sum of its proper divisors (172606587084).

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

129409532916 is a wasteful number, since it uses less digits than its factorization.

129409532916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162263 (or 2162261 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 51.

The spelling of 129409532916 in words is "one hundred twenty-nine billion, four hundred nine million, five hundred thirty-two thousand, nine hundred sixteen".