12447892356457 has 2 divisors, whose sum is σ = 12447892356458. Its totient is φ = 12447892356456.

The previous prime is 12447892356443. The next prime is 12447892356517. The reversal of 12447892356457 is 75465329874421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12332661980521 + 115230375936 = 3511789^2 + 339456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12447892356457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12447892356392 and 12447892356401.

It is not a weakly prime, because it can be changed into another prime (12447892356157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6223946178228 + 6223946178229.

It is an arithmetic number, because the mean of its divisors is an integer number (6223946178229).

Almost surely, 2^{12447892356457} is an apocalyptic number.

It is an amenable number.

12447892356457 is a deficient number, since it is larger than the sum of its proper divisors (1).

12447892356457 is an equidigital number, since it uses as much as digits as its factorization.

12447892356457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 406425600, while the sum is 67.

The spelling of 12447892356457 in words is "twelve trillion, four hundred forty-seven billion, eight hundred ninety-two million, three hundred fifty-six thousand, four hundred fifty-seven".