133456245809 has 2 divisors, whose sum is σ = 133456245810. Its totient is φ = 133456245808.

The previous prime is 133456245719. The next prime is 133456245847. The reversal of 133456245809 is 908542654331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92185104400 + 41271141409 = 303620^2 + 203153^2 .

It is a cyclic number.

It is not a de Polignac number, because 133456245809 - 2²⁰ = 133455197233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (133456245709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66728122904 + 66728122905.

It is an arithmetic number, because the mean of its divisors is an integer number (66728122905).

Almost surely, 2^133456245809 is an apocalyptic number.

It is an amenable number.

133456245809 is a deficient number, since it is larger than the sum of its proper divisors (1).

133456245809 is an equidigital number, since it uses as much as digits as its factorization.

133456245809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 133456245809 in words is "one hundred thirty-three billion, four hundred fifty-six million, two hundred forty-five thousand, eight hundred nine".