6345945409 has 2 divisors, whose sum is σ = 6345945410. Its totient is φ = 6345945408.

The previous prime is 6345945371. The next prime is 6345945421. The reversal of 6345945409 is 9045495436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6229629184 + 116316225 = 78928^2 + 10785^2 .

It is a cyclic number.

It is not a de Polignac number, because 6345945409 - 2⁹ = 6345944897 is a prime.

It is not a weakly prime, because it can be changed into another prime (6345945439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3172972704 + 3172972705.

It is an arithmetic number, because the mean of its divisors is an integer number (3172972705).

Almost surely, 2^6345945409 is an apocalyptic number.

It is an amenable number.

6345945409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6345945409 is an equidigital number, since it uses as much as digits as its factorization.

6345945409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The square root of 6345945409 is about 79661.4424235464. The cubic root of 6345945409 is about 1851.3936816419.

The spelling of 6345945409 in words is "six billion, three hundred forty-five million, nine hundred forty-five thousand, four hundred nine".