133755555833838 has 24 divisors (see below), whose sum is σ = 289804417529328. Its totient is φ = 44585075551392.

The previous prime is 133755555833701. The next prime is 133755555833857. The reversal of 133755555833838 is 838338555557331.

133755555833838 is a `hidden beast` number, since 1 + 3 + 3 + 7 + 5 + 5 + 5 + 5 + 583 + 3 + 8 + 38 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1451895 + ... + 16420082.

It is an arithmetic number, because the mean of its divisors is an integer number (12075184063722).

Almost surely, 2^{133755555833838} is an apocalyptic number.

133755555833838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

133755555833838 is an abundant number, since it is smaller than the sum of its proper divisors (156048861695490).

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

133755555833838 is a wasteful number, since it uses less digits than its factorization.

133755555833838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18287768 (or 18287765 counting only the distinct ones).

The product of its digits is 2721600000, while the sum is 72.

The spelling of 133755555833838 in words is "one hundred thirty-three trillion, seven hundred fifty-five billion, five hundred fifty-five million, eight hundred thirty-three thousand, eight hundred thirty-eight".