12728645701 has 2 divisors, whose sum is σ = 12728645702. Its totient is φ = 12728645700.

The previous prime is 12728645689. The next prime is 12728645753. The reversal of 12728645701 is 10754682721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7888104225 + 4840541476 = 88815^2 + 69574^2 .

It is an emirp because it is prime and its reverse (10754682721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12728645701 - 2¹⁵ = 12728612933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12728645791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6364322850 + 6364322851.

It is an arithmetic number, because the mean of its divisors is an integer number (6364322851).

Almost surely, 2^12728645701 is an apocalyptic number.

It is an amenable number.

12728645701 is a deficient number, since it is larger than the sum of its proper divisors (1).

12728645701 is an equidigital number, since it uses as much as digits as its factorization.

12728645701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 188160, while the sum is 43.

The spelling of 12728645701 in words is "twelve billion, seven hundred twenty-eight million, six hundred forty-five thousand, seven hundred one".