12405543533 has 2 divisors, whose sum is σ = 12405543534. Its totient is φ = 12405543532.

The previous prime is 12405543509. The next prime is 12405543539. The reversal of 12405543533 is 33534550421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9228868489 + 3176675044 = 96067^2 + 56362^2 .

It is a cyclic number.

It is not a de Polignac number, because 12405543533 - 2²⁸ = 12137108077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12405543493 and 12405543502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12405543539) 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 as a sum of consecutive naturals, namely, 6202771766 + 6202771767.

It is an arithmetic number, because the mean of its divisors is an integer number (6202771767).

Almost surely, 2^12405543533 is an apocalyptic number.

It is an amenable number.

12405543533 is a deficient number, since it is larger than the sum of its proper divisors (1).

12405543533 is an equidigital number, since it uses as much as digits as its factorization.

12405543533 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 12405543533 in words is "twelve billion, four hundred five million, five hundred forty-three thousand, five hundred thirty-three".