129643957824 has 112 divisors (see below), whose sum is σ = 358063409856. Its totient is φ = 41357260800.

The previous prime is 129643957789. The next prime is 129643957829. The reversal of 129643957824 is 428759346921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (129643957829) 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, 283759 + ... + 582929.

Almost surely, 2^129643957824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129643957824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179031704928).

129643957824 is an abundant number, since it is smaller than the sum of its proper divisors (228419452032).

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

129643957824 is a wasteful number, since it uses less digits than its factorization.

129643957824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299284 (or 299274 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 60.

The spelling of 129643957824 in words is "one hundred twenty-nine billion, six hundred forty-three million, nine hundred fifty-seven thousand, eight hundred twenty-four".