505055555489 has 4 divisors (see below), whose sum is σ = 505060216980. Its totient is φ = 505050894000.

The previous prime is 505055555447. The next prime is 505055555507. The reversal of 505055555489 is 984555550505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 498729739264 + 6325816225 = 706208^2 + 79535^2 .

It is a cyclic number.

It is not a de Polignac number, because 505055555489 - 2¹² = 505055551393 is a prime.

It is a super-2 number, since 2×505055555489² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (505055555429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164262 + ... + 2386239.

It is an arithmetic number, because the mean of its divisors is an integer number (126265054245).

Almost surely, 2^505055555489 is an apocalyptic number.

It is an amenable number.

505055555489 is a deficient number, since it is larger than the sum of its proper divisors (4661491).

505055555489 is a wasteful number, since it uses less digits than its factorization.

505055555489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4661490.

The product of its (nonzero) digits is 22500000, while the sum is 56.

The spelling of 505055555489 in words is "five hundred five billion, fifty-five million, five hundred fifty-five thousand, four hundred eighty-nine".