12442513505 has 4 divisors (see below), whose sum is σ = 14931016212. Its totient is φ = 9954010800.

The previous prime is 12442513487. The next prime is 12442513541. The reversal of 12442513505 is 50531524421.

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 8430177856 + 4012335649 = 91816^2 + 63343^2 .

It is not a de Polignac number, because 12442513505 - 2⁶ = 12442513441 is a prime.

It is a super-2 number, since 2×12442513505² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1244251346 + ... + 1244251355.

It is an arithmetic number, because the mean of its divisors is an integer number (3732754053).

Almost surely, 2^12442513505 is an apocalyptic number.

It is an amenable number.

12442513505 is a deficient number, since it is larger than the sum of its proper divisors (2488502707).

12442513505 is an equidigital number, since it uses as much as digits as its factorization.

12442513505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488502706.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 12442513505 in words is "twelve billion, four hundred forty-two million, five hundred thirteen thousand, five hundred five".