556744680 has 96 divisors (see below), whose sum is σ = 1814024160. Its totient is φ = 148087680.

The previous prime is 556744673. The next prime is 556744687. The reversal of 556744680 is 86447655.

556744680 is a `hidden beast` number, since 5 + 567 + 4 + 4 + 6 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (556744673) and next prime (556744687).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (556744687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157735 + ... + 161225.

It is an arithmetic number, because the mean of its divisors is an integer number (18896085).

Almost surely, 2^556744680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556744680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907012080).

556744680 is an abundant number, since it is smaller than the sum of its proper divisors (1257279480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

556744680 is a wasteful number, since it uses less digits than its factorization.

556744680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3951 (or 3944 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 556744680 is about 23595.4376946053. The cubic root of 556744680 is about 822.6568000811.

The spelling of 556744680 in words is "five hundred fifty-six million, seven hundred forty-four thousand, six hundred eighty".