129891230720 has 44 divisors (see below), whose sum is σ = 311586749724. Its totient is φ = 51956490240.

The previous prime is 129891230719. The next prime is 129891230723. The reversal of 129891230720 is 27032198921.

129891230720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 71242015744 + 58649214976 = 266912^2 + 242176^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (129891230723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12679571 + ... + 12689810.

Almost surely, 2^129891230720 is an apocalyptic number.

129891230720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129891230720 is an abundant number, since it is smaller than the sum of its proper divisors (181695519004).

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

129891230720 is an equidigital number, since it uses as much as digits as its factorization.

129891230720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25369406 (or 25369388 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 129891230720 in words is "one hundred twenty-nine billion, eight hundred ninety-one million, two hundred thirty thousand, seven hundred twenty".