129256368000 has 256 divisors, whose sum is σ = 429255478080. Its totient is φ = 34406400000.

The previous prime is 129256367993. The next prime is 129256368023. The reversal of 129256368000 is 863652921.

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, 30765900 + ... + 30770100.

Almost surely, 2^129256368000 is an apocalyptic number.

129256368000 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 129256368000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214627739040).

129256368000 is an abundant number, since it is smaller than the sum of its proper divisors (299999110080).

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

129256368000 is an equidigital number, since it uses as much as digits as its factorization.

129256368000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874 (or 4852 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 129256368000 in words is "one hundred twenty-nine billion, two hundred fifty-six million, three hundred sixty-eight thousand".