445388339281 has 2 divisors, whose sum is σ = 445388339282. Its totient is φ = 445388339280.

The previous prime is 445388339243. The next prime is 445388339293. The reversal of 445388339281 is 182933883544.

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., 319178671681 + 126209667600 = 564959^2 + 355260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445388339281 is a prime.

It is a super-2 number, since 2×445388339281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (445388330281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222694169640 + 222694169641.

It is an arithmetic number, because the mean of its divisors is an integer number (222694169641).

Almost surely, 2^445388339281 is an apocalyptic number.

It is an amenable number.

445388339281 is a deficient number, since it is larger than the sum of its proper divisors (1).

445388339281 is an equidigital number, since it uses as much as digits as its factorization.

445388339281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19906560, while the sum is 58.

The spelling of 445388339281 in words is "four hundred forty-five billion, three hundred eighty-eight million, three hundred thirty-nine thousand, two hundred eighty-one".