556738985 has 8 divisors (see below), whose sum is σ = 728822016. Its totient is φ = 404901040.

The previous prime is 556738981. The next prime is 556738997. The reversal of 556738985 is 589837655.

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

It is not a de Polignac number, because 556738985 - 2² = 556738981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 556738985.

It is not an unprimeable number, because it can be changed into a prime (556738981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5061209 + ... + 5061318.

It is an arithmetic number, because the mean of its divisors is an integer number (91102752).

Almost surely, 2^556738985 is an apocalyptic number.

556738985 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

556738985 is a deficient number, since it is larger than the sum of its proper divisors (172083031).

556738985 is a wasteful number, since it uses less digits than its factorization.

556738985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10122543.

The product of its digits is 9072000, while the sum is 56.

The square root of 556738985 is about 23595.3170141874. The cubic root of 556738985 is about 822.6539950571.

The spelling of 556738985 in words is "five hundred fifty-six million, seven hundred thirty-eight thousand, nine hundred eighty-five".