450307566421381 has 2 divisors, whose sum is σ = 450307566421382. Its totient is φ = 450307566421380.

The previous prime is 450307566421373. The next prime is 450307566421387. The reversal of 450307566421381 is 183124665703054.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 449966550132225 + 341016289156 = 21212415^2 + 583966^2 .

It is a cyclic number.

It is not a de Polignac number, because 450307566421381 - 2³ = 450307566421373 is a prime.

It is a super-2 number, since 2×450307566421381² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450307566421387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225153783210690 + 225153783210691.

It is an arithmetic number, because the mean of its divisors is an integer number (225153783210691).

Almost surely, 2^{450307566421381} is an apocalyptic number.

It is an amenable number.

450307566421381 is a deficient number, since it is larger than the sum of its proper divisors (1).

450307566421381 is an equidigital number, since it uses as much as digits as its factorization.

450307566421381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 450307566421381 in words is "four hundred fifty trillion, three hundred seven billion, five hundred sixty-six million, four hundred twenty-one thousand, three hundred eighty-one".