133561936989809 has 8 divisors (see below), whose sum is σ = 134523422604480. Its totient is φ = 132600460066416.

The previous prime is 133561936989769. The next prime is 133561936989853. The reversal of 133561936989809 is 908989639165331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133561936989809 - 2⁴⁴ = 115969750945393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133561936989109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30426587 + ... + 34538399.

It is an arithmetic number, because the mean of its divisors is an integer number (16815427825560).

Almost surely, 2^{133561936989809} is an apocalyptic number.

It is an amenable number.

133561936989809 is a deficient number, since it is larger than the sum of its proper divisors (961485614671).

133561936989809 is a wasteful number, since it uses less digits than its factorization.

133561936989809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4345639.

The product of its (nonzero) digits is 2040733440, while the sum is 80.

The spelling of 133561936989809 in words is "one hundred thirty-three trillion, five hundred sixty-one billion, nine hundred thirty-six million, nine hundred eighty-nine thousand, eight hundred nine".