12426728448889 has 2 divisors, whose sum is σ = 12426728448890. Its totient is φ = 12426728448888.

The previous prime is 12426728448859. The next prime is 12426728448907. The reversal of 12426728448889 is 98884482762421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12374107759225 + 52620689664 = 3517685^2 + 229392^2 .

It is a cyclic number.

It is not a de Polignac number, because 12426728448889 - 2²¹ = 12426726351737 is a prime.

It is not a weakly prime, because it can be changed into another prime (12426728448859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6213364224444 + 6213364224445.

It is an arithmetic number, because the mean of its divisors is an integer number (6213364224445).

Almost surely, 2^{12426728448889} is an apocalyptic number.

It is an amenable number.

12426728448889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12426728448889 is an equidigital number, since it uses as much as digits as its factorization.

12426728448889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 792723456, while the sum is 73.

The spelling of 12426728448889 in words is "twelve trillion, four hundred twenty-six billion, seven hundred twenty-eight million, four hundred forty-eight thousand, eight hundred eighty-nine".