133636332505 has 16 divisors (see below), whose sum is σ = 174409162704. Its totient is φ = 97708204800.

The previous prime is 133636332503. The next prime is 133636332539. The reversal of 133636332505 is 505233636331.

It can be written as a sum of positive squares in 8 ways, for example, as 4545591241 + 129090741264 = 67421^2 + 359292^2 .

It is not a de Polignac number, because 133636332505 - 2¹ = 133636332503 is a prime.

It is a Duffinian 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 in 15 ways as a sum of consecutive naturals, for example, 10171374 + ... + 10184503.

It is an arithmetic number, because the mean of its divisors is an integer number (10900572669).

Almost surely, 2^133636332505 is an apocalyptic number.

It is an amenable number.

133636332505 is a deficient number, since it is larger than the sum of its proper divisors (40772830199).

133636332505 is a wasteful number, since it uses less digits than its factorization.

133636332505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20355996.

The product of its (nonzero) digits is 437400, while the sum is 40.

Adding to 133636332505 its reverse (505233636331), we get a palindrome (638869968836).

The spelling of 133636332505 in words is "one hundred thirty-three billion, six hundred thirty-six million, three hundred thirty-two thousand, five hundred five".