450018651893 has 2 divisors, whose sum is σ = 450018651894. Its totient is φ = 450018651892.

The previous prime is 450018651871. The next prime is 450018651967. The reversal of 450018651893 is 398156810054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238199635249 + 211819016644 = 488057^2 + 460238^2 .

It is a cyclic number.

It is not a de Polignac number, because 450018651893 - 2¹² = 450018647797 is a prime.

It is a super-2 number, since 2×450018651893² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450018651493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225009325946 + 225009325947.

It is an arithmetic number, because the mean of its divisors is an integer number (225009325947).

Almost surely, 2^450018651893 is an apocalyptic number.

It is an amenable number.

450018651893 is a deficient number, since it is larger than the sum of its proper divisors (1).

450018651893 is an equidigital number, since it uses as much as digits as its factorization.

450018651893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 450018651893 in words is "four hundred fifty billion, eighteen million, six hundred fifty-one thousand, eight hundred ninety-three".