133544056609 has 2 divisors, whose sum is σ = 133544056610. Its totient is φ = 133544056608.

The previous prime is 133544056603. The next prime is 133544056637. The reversal of 133544056609 is 906650445331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85483140625 + 48060915984 = 292375^2 + 219228^2 .

It is an emirp because it is prime and its reverse (906650445331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133544056609 - 2¹⁵ = 133544023841 is a prime.

It is not a weakly prime, because it can be changed into another prime (133544056603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66772028304 + 66772028305.

It is an arithmetic number, because the mean of its divisors is an integer number (66772028305).

Almost surely, 2^133544056609 is an apocalyptic number.

It is an amenable number.

133544056609 is a deficient number, since it is larger than the sum of its proper divisors (1).

133544056609 is an equidigital number, since it uses as much as digits as its factorization.

133544056609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 133544056609 in words is "one hundred thirty-three billion, five hundred forty-four million, fifty-six thousand, six hundred nine".