129979901436 has 192 divisors, whose sum is σ = 398348267520. Its totient is φ = 31958115840.

The previous prime is 129979901411. The next prime is 129979901453. The reversal of 129979901436 is 634109979921.

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 129979901436.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30246840 + ... + 30251136.

It is an arithmetic number, because the mean of its divisors is an integer number (2074730560).

Almost surely, 2^129979901436 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 129979901436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199174133760).

129979901436 is an abundant number, since it is smaller than the sum of its proper divisors (268368366084).

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

129979901436 is a wasteful number, since it uses less digits than its factorization.

129979901436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6064 (or 6062 counting only the distinct ones).

The product of its (nonzero) digits is 6613488, while the sum is 60.

The spelling of 129979901436 in words is "one hundred twenty-nine billion, nine hundred seventy-nine million, nine hundred one thousand, four hundred thirty-six".