450353500721 has 2 divisors, whose sum is σ = 450353500722. Its totient is φ = 450353500720.

The previous prime is 450353500717. The next prime is 450353500741. The reversal of 450353500721 is 127005353054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393404928400 + 56948572321 = 627220^2 + 238639^2 .

It is a cyclic number.

It is not a de Polignac number, because 450353500721 - 2² = 450353500717 is a prime.

It is a super-2 number, since 2×450353500721² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (450353500741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225176750360 + 225176750361.

It is an arithmetic number, because the mean of its divisors is an integer number (225176750361).

Almost surely, 2^450353500721 is an apocalyptic number.

It is an amenable number.

450353500721 is a deficient number, since it is larger than the sum of its proper divisors (1).

450353500721 is an equidigital number, since it uses as much as digits as its factorization.

450353500721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 35.

Adding to 450353500721 its reverse (127005353054), we get a palindrome (577358853775).

The spelling of 450353500721 in words is "four hundred fifty billion, three hundred fifty-three million, five hundred thousand, seven hundred twenty-one".