12748005505 has 8 divisors (see below), whose sum is σ = 15304056552. Its totient is φ = 10194104448.

The previous prime is 12748005499. The next prime is 12748005541. The reversal of 12748005505 is 50550084721.

12748005505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2176875649 + 10571129856 = 46657^2 + 102816^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12748005505 - 2⁷ = 12748005377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524422 + ... + 548191.

It is an arithmetic number, because the mean of its divisors is an integer number (1913007069).

Almost surely, 2^12748005505 is an apocalyptic number.

It is an amenable number.

12748005505 is a deficient number, since it is larger than the sum of its proper divisors (2556051047).

12748005505 is a wasteful number, since it uses less digits than its factorization.

12748005505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074995.

The product of its (nonzero) digits is 56000, while the sum is 37.

The spelling of 12748005505 in words is "twelve billion, seven hundred forty-eight million, five thousand, five hundred five".