556801818 has 8 divisors (see below), whose sum is σ = 1113603648. Its totient is φ = 185600604.

The previous prime is 556801813. The next prime is 556801837. The reversal of 556801818 is 818108655.

It is a happy number.

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

556801818 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 556801818.

It is not an unprimeable number, because it can be changed into a prime (556801813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46400146 + ... + 46400157.

It is an arithmetic number, because the mean of its divisors is an integer number (139200456).

Almost surely, 2^556801818 is an apocalyptic number.

556801818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

556801818 is a wasteful number, since it uses less digits than its factorization.

556801818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92800308.

The product of its (nonzero) digits is 76800, while the sum is 42.

The square root of 556801818 is about 23596.6484484556. The cubic root of 556801818 is about 822.6849418595.

The spelling of 556801818 in words is "five hundred fifty-six million, eight hundred one thousand, eight hundred eighteen".