556816540 has 96 divisors (see below), whose sum is σ = 1372662144. Its totient is φ = 185794560.

The previous prime is 556816537. The next prime is 556816541. The reversal of 556816540 is 45618655.

It is a junction number, because it is equal to n+sod(n) for n = 556816493 and 556816502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556816541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 964732 + ... + 965308.

It is an arithmetic number, because the mean of its divisors is an integer number (14298564).

Almost surely, 2^556816540 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 556816540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686331072).

556816540 is an abundant number, since it is smaller than the sum of its proper divisors (815845604).

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

556816540 is a wasteful number, since it uses less digits than its factorization.

556816540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 765 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 556816540 is about 23596.9603974749. The cubic root of 556816540 is about 822.6921924710.

The spelling of 556816540 in words is "five hundred fifty-six million, eight hundred sixteen thousand, five hundred forty".