12428245657 has 2 divisors, whose sum is σ = 12428245658. Its totient is φ = 12428245656.

The previous prime is 12428245651. The next prime is 12428245717. The reversal of 12428245657 is 75654282421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10052268121 + 2375977536 = 100261^2 + 48744^2 .

It is a cyclic number.

It is not a de Polignac number, because 12428245657 - 2³ = 12428245649 is a prime.

It is a super-2 number, since 2×12428245657² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12428245651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6214122828 + 6214122829.

It is an arithmetic number, because the mean of its divisors is an integer number (6214122829).

Almost surely, 2^12428245657 is an apocalyptic number.

It is an amenable number.

12428245657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12428245657 is an equidigital number, since it uses as much as digits as its factorization.

12428245657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1075200, while the sum is 46.

The spelling of 12428245657 in words is "twelve billion, four hundred twenty-eight million, two hundred forty-five thousand, six hundred fifty-seven".