12728547557427 has 8 divisors (see below), whose sum is σ = 18276888800464. Its totient is φ = 7832952343008.

The previous prime is 12728547557417. The next prime is 12728547557431. The reversal of 12728547557427 is 72475574582721.

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

It is not a de Polignac number, because 12728547557427 - 2²³ = 12728539168819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12728547557417) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 163186507108 + ... + 163186507185.

It is an arithmetic number, because the mean of its divisors is an integer number (2284611100058).

Almost surely, 2^{12728547557427} is an apocalyptic number.

12728547557427 is a deficient number, since it is larger than the sum of its proper divisors (5548341243037).

12728547557427 is a wasteful number, since it uses less digits than its factorization.

12728547557427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326373014309.

The product of its digits is 307328000, while the sum is 66.

The spelling of 12728547557427 in words is "twelve trillion, seven hundred twenty-eight billion, five hundred forty-seven million, five hundred fifty-seven thousand, four hundred twenty-seven".