129995738128 has 80 divisors (see below), whose sum is σ = 261875846016. Its totient is φ = 62476876800.

The previous prime is 129995738113. The next prime is 129995738141. The reversal of 129995738128 is 821837599921.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 129995738128.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9340551 + ... + 9354457.

Almost surely, 2^129995738128 is an apocalyptic number.

It is an amenable number.

129995738128 is an abundant number, since it is smaller than the sum of its proper divisors (131880107888).

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

129995738128 is a wasteful number, since it uses less digits than its factorization.

129995738128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14192 (or 14186 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 64.

The spelling of 129995738128 in words is "one hundred twenty-nine billion, nine hundred ninety-five million, seven hundred thirty-eight thousand, one hundred twenty-eight".