133818503280 has 640 divisors, whose sum is σ = 547816366080. Its totient is φ = 26178785280.

The previous prime is 133818503251. The next prime is 133818503293. The reversal of 133818503280 is 82305818331.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 60742659 + ... + 60744861.

It is an arithmetic number, because the mean of its divisors is an integer number (855963072).

Almost surely, 2^133818503280 is an apocalyptic number.

133818503280 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 133818503280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273908183040).

133818503280 is an abundant number, since it is smaller than the sum of its proper divisors (413997862800).

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

133818503280 is a wasteful number, since it uses less digits than its factorization.

133818503280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429 (or 2423 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 133818503280 in words is "one hundred thirty-three billion, eight hundred eighteen million, five hundred three thousand, two hundred eighty".