12550400443 has 4 divisors (see below), whose sum is σ = 14343314800. Its totient is φ = 10757486088.

The previous prime is 12550400417. The next prime is 12550400453. The reversal of 12550400443 is 34400405521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12550400443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12550400453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896457168 + ... + 896457181.

It is an arithmetic number, because the mean of its divisors is an integer number (3585828700).

Almost surely, 2^12550400443 is an apocalyptic number.

12550400443 is a deficient number, since it is larger than the sum of its proper divisors (1792914357).

12550400443 is an equidigital number, since it uses as much as digits as its factorization.

12550400443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792914356.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 12550400443 its reverse (34400405521), we get a palindrome (46950805964).

The spelling of 12550400443 in words is "twelve billion, five hundred fifty million, four hundred thousand, four hundred forty-three".