550855583561 has 2 divisors, whose sum is σ = 550855583562. Its totient is φ = 550855583560.

The previous prime is 550855583521. The next prime is 550855583569. The reversal of 550855583561 is 165385558055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287333521225 + 263522062336 = 536035^2 + 513344^2 .

It is a cyclic number.

It is not a de Polignac number, because 550855583561 - 2¹⁴ = 550855567177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 550855583497 and 550855583506.

It is not a weakly prime, because it can be changed into another prime (550855583569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275427791780 + 275427791781.

It is an arithmetic number, because the mean of its divisors is an integer number (275427791781).

Almost surely, 2^550855583561 is an apocalyptic number.

It is an amenable number.

550855583561 is a deficient number, since it is larger than the sum of its proper divisors (1).

550855583561 is an equidigital number, since it uses as much as digits as its factorization.

550855583561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000000, while the sum is 56.

The spelling of 550855583561 in words is "five hundred fifty billion, eight hundred fifty-five million, five hundred eighty-three thousand, five hundred sixty-one".