133308721728000 has 6400 divisors, whose sum is σ = 654011540582400. Its totient is φ = 26207384371200.

The previous prime is 133308721727989. The next prime is 133308721728001. The reversal of 133308721728000 is 827127803331.

It is a happy number.

133308721728000 is a `hidden beast` number, since 1 + 3 + 330 + 8 + 72 + 172 + 80 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (6400).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (133308721728001) by changing a digit.

It is a polite number, since it can be written in 639 ways as a sum of consecutive naturals, for example, 959055551931 + ... + 959055552069.

It is an arithmetic number, because the mean of its divisors is an integer number (102189303216).

Almost surely, 2^{133308721728000} is an apocalyptic number.

133308721728000 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 133308721728000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327005770291200).

133308721728000 is an abundant number, since it is smaller than the sum of its proper divisors (520702818854400).

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

133308721728000 is a wasteful number, since it uses less digits than its factorization.

133308721728000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 133308721728000 in words is "one hundred thirty-three trillion, three hundred eight billion, seven hundred twenty-one million, seven hundred twenty-eight thousand".