450707561375821 has 2 divisors, whose sum is σ = 450707561375822. Its totient is φ = 450707561375820.

The previous prime is 450707561375693. The next prime is 450707561375861. The reversal of 450707561375821 is 128573165707054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450237049064100 + 470512311721 = 21218790^2 + 685939^2 .

It is a cyclic number.

It is not a de Polignac number, because 450707561375821 - 2⁷ = 450707561375693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 450707561375821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450707561375861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225353780687910 + 225353780687911.

It is an arithmetic number, because the mean of its divisors is an integer number (225353780687911).

Almost surely, 2^{450707561375821} is an apocalyptic number.

It is an amenable number.

450707561375821 is a deficient number, since it is larger than the sum of its proper divisors (1).

450707561375821 is an equidigital number, since it uses as much as digits as its factorization.

450707561375821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392000, while the sum is 61.

The spelling of 450707561375821 in words is "four hundred fifty trillion, seven hundred seven billion, five hundred sixty-one million, three hundred seventy-five thousand, eight hundred twenty-one".