133694209280 has 72 divisors (see below), whose sum is σ = 320366340000. Its totient is φ = 53456488448.

The previous prime is 133694209247. The next prime is 133694209291. The reversal of 133694209280 is 82902496331.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3435371 + ... + 3474069.

It is an arithmetic number, because the mean of its divisors is an integer number (4449532500).

Almost surely, 2^133694209280 is an apocalyptic number.

133694209280 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 133694209280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160183170000).

133694209280 is an abundant number, since it is smaller than the sum of its proper divisors (186672130720).

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

133694209280 is an equidigital number, since it uses as much as digits as its factorization.

133694209280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41419 (or 41405 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 133694209280 in words is "one hundred thirty-three billion, six hundred ninety-four million, two hundred nine thousand, two hundred eighty".