12445403545 has 4 divisors (see below), whose sum is σ = 14934484260. Its totient is φ = 9956322832.

The previous prime is 12445403491. The next prime is 12445403573. The reversal of 12445403545 is 54530454421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2026710361 + 10418693184 = 45019^2 + 102072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12445403545 is a prime.

It is an unprimeable number.

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, 1244540350 + ... + 1244540359.

It is an arithmetic number, because the mean of its divisors is an integer number (3733621065).

Almost surely, 2^12445403545 is an apocalyptic number.

It is an amenable number.

12445403545 is a deficient number, since it is larger than the sum of its proper divisors (2489080715).

12445403545 is an equidigital number, since it uses as much as digits as its factorization.

12445403545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489080714.

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 12445403545 its reverse (54530454421), we get a palindrome (66975857966).

The spelling of 12445403545 in words is "twelve billion, four hundred forty-five million, four hundred three thousand, five hundred forty-five".