133312807809 has 12 divisors (see below), whose sum is σ = 192673572052. Its totient is φ = 88824146400.

The previous prime is 133312807801. The next prime is 133312807861. The reversal of 133312807809 is 908708213331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2804020209 + 130508787600 = 52953^2 + 361260^2 .

It is not a de Polignac number, because 133312807809 - 2³ = 133312807801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133312807801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4238362 + ... + 4269699.

Almost surely, 2^133312807809 is an apocalyptic number.

It is an amenable number.

133312807809 is a deficient number, since it is larger than the sum of its proper divisors (59360764243).

133312807809 is a wasteful number, since it uses less digits than its factorization.

133312807809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8509808 (or 8509805 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 133312807809 in words is "one hundred thirty-three billion, three hundred twelve million, eight hundred seven thousand, eight hundred nine".