556539985 has 8 divisors (see below), whose sum is σ = 670844160. Its totient is φ = 443234544.

The previous prime is 556539943. The next prime is 556540009. The reversal of 556539985 is 589935655.

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

It is a cyclic number.

It is not a de Polignac number, because 556539985 - 2⁷ = 556539857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248455 + ... + 250684.

It is an arithmetic number, because the mean of its divisors is an integer number (83855520).

Almost surely, 2^556539985 is an apocalyptic number.

It is an amenable number.

556539985 is a deficient number, since it is larger than the sum of its proper divisors (114304175).

556539985 is a wasteful number, since it uses less digits than its factorization.

556539985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499367.

The product of its digits is 7290000, while the sum is 55.

The square root of 556539985 is about 23591.0996988271. The cubic root of 556539985 is about 822.5559672808. Note that the first 3 decimals are identical.

The spelling of 556539985 in words is "five hundred fifty-six million, five hundred thirty-nine thousand, nine hundred eighty-five".