550855583521 has 2 divisors, whose sum is σ = 550855583522. Its totient is φ = 550855583520.

The previous prime is 550855583519. The next prime is 550855583561. The reversal of 550855583521 is 125385558055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330350207121 + 220505376400 = 574761^2 + 469580^2 .

It is a cyclic number.

It is not a de Polignac number, because 550855583521 - 2¹ = 550855583519 is a prime.

It is a super-2 number, since 2×550855583521² (a number of 24 digits) contains 22 as substring.

Together with 550855583519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (550855583561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275427791760 + 275427791761.

It is an arithmetic number, because the mean of its divisors is an integer number (275427791761).

Almost surely, 2^550855583521 is an apocalyptic number.

It is an amenable number.

550855583521 is a deficient number, since it is larger than the sum of its proper divisors (1).

550855583521 is an equidigital number, since it uses as much as digits as its factorization.

550855583521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000000, while the sum is 52.

The spelling of 550855583521 in words is "five hundred fifty billion, eight hundred fifty-five million, five hundred eighty-three thousand, five hundred twenty-one".