555055555081 has 2 divisors, whose sum is σ = 555055555082. Its totient is φ = 555055555080.

The previous prime is 555055555051. The next prime is 555055555099. The reversal of 555055555081 is 180555550555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 289099782400 + 265955772681 = 537680^2 + 515709^2 .

It is a cyclic number.

It is not a de Polignac number, because 555055555081 - 2⁹ = 555055554569 is a prime.

It is a super-2 number, since 2×555055555081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (555055555051) 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, 277527777540 + 277527777541.

It is an arithmetic number, because the mean of its divisors is an integer number (277527777541).

Almost surely, 2^555055555081 is an apocalyptic number.

It is an amenable number.

555055555081 is a deficient number, since it is larger than the sum of its proper divisors (1).

555055555081 is an equidigital number, since it uses as much as digits as its factorization.

555055555081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3125000, while the sum is 49.

The spelling of 555055555081 in words is "five hundred fifty-five billion, fifty-five million, five hundred fifty-five thousand, eighty-one".