129388115208 has 128 divisors (see below), whose sum is σ = 373145149440. Its totient is φ = 37018176000.

The previous prime is 129388115203. The next prime is 129388115209. The reversal of 129388115208 is 802511883921.

It is a super-3 number, since 3×129388115208³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (129388115201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142741 + ... + 528347.

It is an arithmetic number, because the mean of its divisors is an integer number (2915196480).

Almost surely, 2^129388115208 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 129388115208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186572574720).

129388115208 is an abundant number, since it is smaller than the sum of its proper divisors (243757034232).

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

129388115208 is a wasteful number, since it uses less digits than its factorization.

129388115208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385699 (or 385695 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 48.

The spelling of 129388115208 in words is "one hundred twenty-nine billion, three hundred eighty-eight million, one hundred fifteen thousand, two hundred eight".