12351244657 has 4 divisors (see below), whose sum is σ = 12749671936. Its totient is φ = 11952817380.

The previous prime is 12351244649. The next prime is 12351244667. The reversal of 12351244657 is 75644215321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75644215321 = 23 ⋅3288878927.

It is a cyclic number.

It is not a de Polignac number, because 12351244657 - 2³ = 12351244649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12351244627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199213593 + ... + 199213654.

It is an arithmetic number, because the mean of its divisors is an integer number (3187417984).

Almost surely, 2^12351244657 is an apocalyptic number.

It is an amenable number.

12351244657 is a deficient number, since it is larger than the sum of its proper divisors (398427279).

12351244657 is an equidigital number, since it uses as much as digits as its factorization.

12351244657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398427278.

The product of its digits is 201600, while the sum is 40.

Adding to 12351244657 its reverse (75644215321), we get a palindrome (87995459978).

The spelling of 12351244657 in words is "twelve billion, three hundred fifty-one million, two hundred forty-four thousand, six hundred fifty-seven".