12727894387521 has 8 divisors (see below), whose sum is σ = 17055804875200. Its totient is φ = 8442623412432.

The previous prime is 12727894387487. The next prime is 12727894387531. The reversal of 12727894387521 is 12578349872721.

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

It is not a de Polignac number, because 12727894387521 - 2¹⁸ = 12727894125377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12727894387531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10659877450 + ... + 10659878643.

It is an arithmetic number, because the mean of its divisors is an integer number (2131975609400).

Almost surely, 2^{12727894387521} is an apocalyptic number.

It is an amenable number.

12727894387521 is a deficient number, since it is larger than the sum of its proper divisors (4327910487679).

12727894387521 is a wasteful number, since it uses less digits than its factorization.

12727894387521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21319756295.

The product of its digits is 94832640, while the sum is 66.

The spelling of 12727894387521 in words is "twelve trillion, seven hundred twenty-seven billion, eight hundred ninety-four million, three hundred eighty-seven thousand, five hundred twenty-one".