133533455418 has 80 divisors (see below), whose sum is σ = 326536388640. Its totient is φ = 40449650400.

The previous prime is 133533455401. The next prime is 133533455423. The reversal of 133533455418 is 814554335331.

133533455418 is a `hidden beast` number, since 1 + 3 + 3 + 53 + 34 + 554 + 18 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5367448 + ... + 5392268.

It is an arithmetic number, because the mean of its divisors is an integer number (4081704858).

Almost surely, 2^133533455418 is an apocalyptic number.

133533455418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133533455418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163268194320).

133533455418 is an abundant number, since it is smaller than the sum of its proper divisors (193002933222).

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

133533455418 is a wasteful number, since it uses less digits than its factorization.

133533455418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27865 (or 27856 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 133533455418 in words is "one hundred thirty-three billion, five hundred thirty-three million, four hundred fifty-five thousand, four hundred eighteen".