505556000999 has 8 divisors (see below), whose sum is σ = 577940112768. Its totient is φ = 433212345720.

The previous prime is 505556000977. The next prime is 505556001023. The reversal of 505556000999 is 999000655505.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505556000999 - 2¹² = 505555996903 is a prime.

It is a super-2 number, since 2×505556000999² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505556000999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505556000909) 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 in 7 ways as a sum of consecutive naturals, for example, 10087337 + ... + 10137330.

It is an arithmetic number, because the mean of its divisors is an integer number (72242514096).

Almost surely, 2^505556000999 is an apocalyptic number.

505556000999 is a deficient number, since it is larger than the sum of its proper divisors (72384111769).

505556000999 is a wasteful number, since it uses less digits than its factorization.

505556000999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20228245.

The product of its (nonzero) digits is 2733750, while the sum is 53.

The spelling of 505556000999 in words is "five hundred five billion, five hundred fifty-six million, nine hundred ninety-nine", and thus it is an aban number.