12368455681 has 2 divisors, whose sum is σ = 12368455682. Its totient is φ = 12368455680.

The previous prime is 12368455679. The next prime is 12368455711. The reversal of 12368455681 is 18655486321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11083878400 + 1284577281 = 105280^2 + 35841^2 .

It is a cyclic number.

It is not a de Polignac number, because 12368455681 - 2¹ = 12368455679 is a prime.

It is a super-2 number, since 2×12368455681² (a number of 21 digits) contains 22 as substring.

Together with 12368455679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12368455661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6184227840 + 6184227841.

It is an arithmetic number, because the mean of its divisors is an integer number (6184227841).

Almost surely, 2^12368455681 is an apocalyptic number.

It is an amenable number.

12368455681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12368455681 is an equidigital number, since it uses as much as digits as its factorization.

12368455681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382400, while the sum is 49.

The spelling of 12368455681 in words is "twelve billion, three hundred sixty-eight million, four hundred fifty-five thousand, six hundred eighty-one".