450000409549 has 2 divisors, whose sum is σ = 450000409550. Its totient is φ = 450000409548.

The previous prime is 450000409513. The next prime is 450000409589. The reversal of 450000409549 is 945904000054.

It is an a-pointer prime, because the next prime (450000409589) can be obtained adding 450000409549 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328206389449 + 121794020100 = 572893^2 + 348990^2 .

It is a cyclic number.

It is not a de Polignac number, because 450000409549 - 2²¹ = 449998312397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450000409589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225000204774 + 225000204775.

It is an arithmetic number, because the mean of its divisors is an integer number (225000204775).

Almost surely, 2^450000409549 is an apocalyptic number.

It is an amenable number.

450000409549 is a deficient number, since it is larger than the sum of its proper divisors (1).

450000409549 is an equidigital number, since it uses as much as digits as its factorization.

450000409549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 450000409549 in words is "four hundred fifty billion, four hundred nine thousand, five hundred forty-nine".