133784205605 has 16 divisors (see below), whose sum is σ = 164808955584. Its totient is φ = 104193275520.

The previous prime is 133784205589. The next prime is 133784205637. The reversal of 133784205605 is 506502487331.

It is not a de Polignac number, because 133784205605 - 2⁴ = 133784205589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 602987 + ... + 794456.

It is an arithmetic number, because the mean of its divisors is an integer number (10300559724).

Almost surely, 2^133784205605 is an apocalyptic number.

It is an amenable number.

133784205605 is a deficient number, since it is larger than the sum of its proper divisors (31024749979).

133784205605 is a wasteful number, since it uses less digits than its factorization.

133784205605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397956.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 133784205605 in words is "one hundred thirty-three billion, seven hundred eighty-four million, two hundred five thousand, six hundred five".