12445305533 has 4 divisors (see below), whose sum is σ = 12781665180. Its totient is φ = 12108945888.

The previous prime is 12445305493. The next prime is 12445305541. The reversal of 12445305533 is 33550354421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33550354421 = 10273 ⋅3265877.

It can be written as a sum of positive squares in 2 ways, for example, as 4947996964 + 7497308569 = 70342^2 + 86587^2 .

It is a cyclic number.

It is not a de Polignac number, because 12445305533 - 2⁶ = 12445305469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12445305493 and 12445305502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12445305133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168179768 + ... + 168179841.

It is an arithmetic number, because the mean of its divisors is an integer number (3195416295).

Almost surely, 2^12445305533 is an apocalyptic number.

It is an amenable number.

12445305533 is a deficient number, since it is larger than the sum of its proper divisors (336359647).

12445305533 is an equidigital number, since it uses as much as digits as its factorization.

12445305533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336359646.

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 12445305533 its reverse (33550354421), we get a palindrome (45995659954).

The spelling of 12445305533 in words is "twelve billion, four hundred forty-five million, three hundred five thousand, five hundred thirty-three".