12742643361 has 16 divisors (see below), whose sum is σ = 19455980544. Its totient is φ = 7267028304.

The previous prime is 12742643359. The next prime is 12742643383. The reversal of 12742643361 is 16334624721.

It is not a de Polignac number, because 12742643361 - 2¹ = 12742643359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12742643351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 592611 + ... + 613736.

It is an arithmetic number, because the mean of its divisors is an integer number (1215998784).

Almost surely, 2^12742643361 is an apocalyptic number.

It is an amenable number.

12742643361 is a deficient number, since it is larger than the sum of its proper divisors (6713337183).

12742643361 is a wasteful number, since it uses less digits than its factorization.

12742643361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206860.

The product of its digits is 145152, while the sum is 39.

The spelling of 12742643361 in words is "twelve billion, seven hundred forty-two million, six hundred forty-three thousand, three hundred sixty-one".