450606256921 has 2 divisors, whose sum is σ = 450606256922. Its totient is φ = 450606256920.

The previous prime is 450606256909. The next prime is 450606256931. The reversal of 450606256921 is 129652606054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 447266688400 + 3339568521 = 668780^2 + 57789^2 .

It is a cyclic number.

It is not a de Polignac number, because 450606256921 - 2²¹ = 450604159769 is a prime.

It is not a weakly prime, because it can be changed into another prime (450606256931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225303128460 + 225303128461.

It is an arithmetic number, because the mean of its divisors is an integer number (225303128461).

Almost surely, 2^450606256921 is an apocalyptic number.

It is an amenable number.

450606256921 is a deficient number, since it is larger than the sum of its proper divisors (1).

450606256921 is an equidigital number, since it uses as much as digits as its factorization.

450606256921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 450606256921 in words is "four hundred fifty billion, six hundred six million, two hundred fifty-six thousand, nine hundred twenty-one".