8408447513321 has 2 divisors, whose sum is σ = 8408447513322. Its totient is φ = 8408447513320.

The previous prime is 8408447513269. The next prime is 8408447513467. The reversal of 8408447513321 is 1233157448048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7733849760400 + 674597752921 = 2780980^2 + 821339^2 .

It is a cyclic number.

It is not a de Polignac number, because 8408447513321 - 2¹⁴ = 8408447496937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8408447513321.

It is not a weakly prime, because it can be changed into another prime (8408447516321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4204223756660 + 4204223756661.

It is an arithmetic number, because the mean of its divisors is an integer number (4204223756661).

Almost surely, 2^{8408447513321} is an apocalyptic number.

It is an amenable number.

8408447513321 is a deficient number, since it is larger than the sum of its proper divisors (1).

8408447513321 is an equidigital number, since it uses as much as digits as its factorization.

8408447513321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 8408447513321 in words is "eight trillion, four hundred eight billion, four hundred forty-seven million, five hundred thirteen thousand, three hundred twenty-one".