445450626484781 has 2 divisors, whose sum is σ = 445450626484782. Its totient is φ = 445450626484780.

The previous prime is 445450626484741. The next prime is 445450626484847. The reversal of 445450626484781 is 187484626054544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377554822792900 + 67895803691881 = 19430770^2 + 8239891^2 .

It is a cyclic number.

It is not a de Polignac number, because 445450626484781 - 2³⁸ = 445175748577837 is a prime.

It is a super-3 number, since 3×445450626484781³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445450626484741) 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, 222725313242390 + 222725313242391.

It is an arithmetic number, because the mean of its divisors is an integer number (222725313242391).

Almost surely, 2^{445450626484781} is an apocalyptic number.

It is an amenable number.

445450626484781 is a deficient number, since it is larger than the sum of its proper divisors (1).

445450626484781 is an equidigital number, since it uses as much as digits as its factorization.

445450626484781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 825753600, while the sum is 68.

The spelling of 445450626484781 in words is "four hundred forty-five trillion, four hundred fifty billion, six hundred twenty-six million, four hundred eighty-four thousand, seven hundred eighty-one".