450864490409 has 2 divisors, whose sum is σ = 450864490410. Its totient is φ = 450864490408.

The previous prime is 450864490343. The next prime is 450864490411. The reversal of 450864490409 is 904094468054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342131406400 + 108733084009 = 584920^2 + 329747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450864490409 is a prime.

Together with 450864490411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (450864490469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225432245204 + 225432245205.

It is an arithmetic number, because the mean of its divisors is an integer number (225432245205).

Almost surely, 2^450864490409 is an apocalyptic number.

It is an amenable number.

450864490409 is a deficient number, since it is larger than the sum of its proper divisors (1).

450864490409 is an equidigital number, since it uses as much as digits as its factorization.

450864490409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 450864490409 in words is "four hundred fifty billion, eight hundred sixty-four million, four hundred ninety thousand, four hundred nine".