133636332506 has 4 divisors (see below), whose sum is σ = 200454498762. Its totient is φ = 66818166252.

The previous prime is 133636332503. The next prime is 133636332539. The reversal of 133636332506 is 605233636331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605233636331 = 8209 ⋅73728059.

It can be written as a sum of positive squares in only one way, i.e., 133547124481 + 89208025 = 365441^2 + 9445^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133636332503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33409083125 + ... + 33409083128.

Almost surely, 2^133636332506 is an apocalyptic number.

133636332506 is a deficient number, since it is larger than the sum of its proper divisors (66818166256).

133636332506 is an equidigital number, since it uses as much as digits as its factorization.

133636332506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66818166255.

The product of its (nonzero) digits is 524880, while the sum is 41.

Adding to 133636332506 its reverse (605233636331), we get a palindrome (738869968837).

The spelling of 133636332506 in words is "one hundred thirty-three billion, six hundred thirty-six million, three hundred thirty-two thousand, five hundred six".