12428246681 has 2 divisors, whose sum is σ = 12428246682. Its totient is φ = 12428246680.

The previous prime is 12428246671. The next prime is 12428246687. The reversal of 12428246681 is 18664282421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9161552656 + 3266694025 = 95716^2 + 57155^2 .

It is a cyclic number.

It is not a de Polignac number, because 12428246681 - 2¹⁰ = 12428245657 is a prime.

It is a super-2 number, since 2×12428246681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12428246687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6214123340 + 6214123341.

It is an arithmetic number, because the mean of its divisors is an integer number (6214123341).

Almost surely, 2^12428246681 is an apocalyptic number.

It is an amenable number.

12428246681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12428246681 is an equidigital number, since it uses as much as digits as its factorization.

12428246681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 294912, while the sum is 44.

The spelling of 12428246681 in words is "twelve billion, four hundred twenty-eight million, two hundred forty-six thousand, six hundred eighty-one".