129922179520 has 112 divisors (see below), whose sum is σ = 354889978560. Its totient is φ = 44378947584.

The previous prime is 129922179487. The next prime is 129922179589. The reversal of 129922179520 is 25971229921.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

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, 494752 + ... + 710368.

Almost surely, 2^129922179520 is an apocalyptic number.

129922179520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129922179520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177444989280).

129922179520 is an abundant number, since it is smaller than the sum of its proper divisors (224967799040).

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

129922179520 is a wasteful number, since it uses less digits than its factorization.

129922179520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215910 (or 215900 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 129922179520 in words is "one hundred twenty-nine billion, nine hundred twenty-two million, one hundred seventy-nine thousand, five hundred twenty".