129515820000 has 360 divisors, whose sum is σ = 494210283336. Its totient is φ = 29602944000.

The previous prime is 129515819989. The next prime is 129515820041. The reversal of 129515820000 is 28515921.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2917974 + ... + 2962026.

Almost surely, 2^129515820000 is an apocalyptic number.

129515820000 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 129515820000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247105141668).

129515820000 is an abundant number, since it is smaller than the sum of its proper divisors (364694463336).

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

129515820000 is an equidigital number, since it uses as much as digits as its factorization.

129515820000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44100 (or 44070 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 33.

The spelling of 129515820000 in words is "one hundred twenty-nine billion, five hundred fifteen million, eight hundred twenty thousand".