12444454545 has 8 divisors (see below), whose sum is σ = 19911127296. Its totient is φ = 6637042416.

The previous prime is 12444454493. The next prime is 12444454553. The reversal of 12444454545 is 54545444421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12444454545 - 2¹¹ = 12444452497 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 12444454497 and 12444454506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414815137 + ... + 414815166.

It is an arithmetic number, because the mean of its divisors is an integer number (2488890912).

Almost surely, 2^12444454545 is an apocalyptic number.

12444454545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12444454545 is a deficient number, since it is larger than the sum of its proper divisors (7466672751).

12444454545 is an equidigital number, since it uses as much as digits as its factorization.

12444454545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829630311.

The product of its digits is 1024000, while the sum is 42.

Adding to 12444454545 its reverse (54545444421), we get a palindrome (66989898966).

It can be divided in two parts, 1244445 and 4545, that added together give a triangular number (1248990 = T₁₅₈₀).

The spelling of 12444454545 in words is "twelve billion, four hundred forty-four million, four hundred fifty-four thousand, five hundred forty-five".