129989021184 has 320 divisors, whose sum is σ = 420852706560. Its totient is φ = 39287808000.

The previous prime is 129989021137. The next prime is 129989021231. The reversal of 129989021184 is 481120989921.

It is an interprime number because it is at equal distance from previous prime (129989021137) and next prime (129989021231).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 129989021184.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74662554 + ... + 74664294.

It is an arithmetic number, because the mean of its divisors is an integer number (1315164708).

Almost surely, 2^129989021184 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 129989021184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210426353280).

129989021184 is an abundant number, since it is smaller than the sum of its proper divisors (290863685376).

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

129989021184 is a wasteful number, since it uses less digits than its factorization.

129989021184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270 (or 2248 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The spelling of 129989021184 in words is "one hundred twenty-nine billion, nine hundred eighty-nine million, twenty-one thousand, one hundred eighty-four".