129352784928 has 48 divisors (see below), whose sum is σ = 357422173920. Its totient is φ = 40848247296.

The previous prime is 129352784923. The next prime is 129352784963. The reversal of 129352784928 is 829487253921.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (129352784923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35456725 + ... + 35460372.

It is an arithmetic number, because the mean of its divisors is an integer number (7446295290).

Almost surely, 2^129352784928 is an apocalyptic number.

It is an amenable number.

129352784928 is an abundant number, since it is smaller than the sum of its proper divisors (228069388992).

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

129352784928 is a wasteful number, since it uses less digits than its factorization.

129352784928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70917129 (or 70917121 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 60.

The spelling of 129352784928 in words is "one hundred twenty-nine billion, three hundred fifty-two million, seven hundred eighty-four thousand, nine hundred twenty-eight".