445641213481 has 2 divisors, whose sum is σ = 445641213482. Its totient is φ = 445641213480.

The previous prime is 445641213473. The next prime is 445641213503. The reversal of 445641213481 is 184312146544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290673017881 + 154968195600 = 539141^2 + 393660^2 .

It is a cyclic number.

It is not a de Polignac number, because 445641213481 - 2³ = 445641213473 is a prime.

It is a super-2 number, since 2×445641213481² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (445641216481) 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, 222820606740 + 222820606741.

It is an arithmetic number, because the mean of its divisors is an integer number (222820606741).

Almost surely, 2^445641213481 is an apocalyptic number.

It is an amenable number.

445641213481 is a deficient number, since it is larger than the sum of its proper divisors (1).

445641213481 is an equidigital number, since it uses as much as digits as its factorization.

445641213481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 368640, while the sum is 43.

The spelling of 445641213481 in words is "four hundred forty-five billion, six hundred forty-one million, two hundred thirteen thousand, four hundred eighty-one".