129696880000 has 160 divisors (see below), whose sum is σ = 325752257160. Its totient is φ = 51416064000.

The previous prime is 129696879971. The next prime is 129696880007. The reversal of 129696880000 is 88696921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129696880007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9032827 + ... + 9047173.

Almost surely, 2^129696880000 is an apocalyptic number.

129696880000 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 129696880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162876128580).

129696880000 is an abundant number, since it is smaller than the sum of its proper divisors (196055377160).

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

129696880000 is an equidigital number, since it uses as much as digits as its factorization.

129696880000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14494 (or 14467 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 129696880000 in words is "one hundred twenty-nine billion, six hundred ninety-six million, eight hundred eighty thousand".