555445204021 has 2 divisors, whose sum is σ = 555445204022. Its totient is φ = 555445204020.

The previous prime is 555445204001. The next prime is 555445204051. The reversal of 555445204021 is 120402544555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299192590225 + 256252613796 = 546985^2 + 506214^2 .

It is a cyclic number.

It is not a de Polignac number, because 555445204021 - 2¹¹ = 555445201973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555445204001) 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, 277722602010 + 277722602011.

It is an arithmetic number, because the mean of its divisors is an integer number (277722602011).

Almost surely, 2^555445204021 is an apocalyptic number.

It is an amenable number.

555445204021 is a deficient number, since it is larger than the sum of its proper divisors (1).

555445204021 is an equidigital number, since it uses as much as digits as its factorization.

555445204021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160000, while the sum is 37.

Adding to 555445204021 its reverse (120402544555), we get a palindrome (675847748576).

The spelling of 555445204021 in words is "five hundred fifty-five billion, four hundred forty-five million, two hundred four thousand, twenty-one".