12278858727745 has 8 divisors (see below), whose sum is σ = 14734970311680. Its totient is φ = 9822860423280.

The previous prime is 12278858727727. The next prime is 12278858727749. The reversal of 12278858727745 is 54772785887221.

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

It is not a de Polignac number, because 12278858727745 - 2¹¹ = 12278858725697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12278858727749) by changing a digit.

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, 28081215 + ... + 28515124.

It is an arithmetic number, because the mean of its divisors is an integer number (1841871288960).

Almost surely, 2^{12278858727745} is an apocalyptic number.

It is an amenable number.

12278858727745 is a deficient number, since it is larger than the sum of its proper divisors (2456111583935).

12278858727745 is an equidigital number, since it uses as much as digits as its factorization.

12278858727745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56639735.

The product of its digits is 983449600, while the sum is 73.

The spelling of 12278858727745 in words is "twelve trillion, two hundred seventy-eight billion, eight hundred fifty-eight million, seven hundred twenty-seven thousand, seven hundred forty-five".