1005555055559 has 2 divisors, whose sum is σ = 1005555055560. Its totient is φ = 1005555055558.

The previous prime is 1005555055543. The next prime is 1005555055591. The reversal of 1005555055559 is 9555505555001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1005555055559 - 2⁴ = 1005555055543 is a prime.

It is a super-2 number, since 2×1005555055559² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005555051559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502777527779 + 502777527780.

It is an arithmetic number, because the mean of its divisors is an integer number (502777527780).

Almost surely, 2^{1005555055559} is an apocalyptic number.

1005555055559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005555055559 is an equidigital number, since it uses as much as digits as its factorization.

1005555055559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3515625, while the sum is 50.

The spelling of 1005555055559 in words is "one trillion, five billion, five hundred fifty-five million, fifty-five thousand, five hundred fifty-nine".