556764384618 has 120 divisors (see below), whose sum is σ = 1427212851372. Its totient is φ = 161234758656.

The previous prime is 556764384599. The next prime is 556764384629. The reversal of 556764384618 is 816483467655.

556764384618 is a `hidden beast` number, since 5 + 5 + 6 + 7 + 6 + 4 + 3 + 8 + 4 + 618 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 500707666449 + 56056718169 = 707607^2 + 236763^2 .

It is a super-3 number, since 3×556764384618³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 151246 + ... + 1066022.

Almost surely, 2^556764384618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556764384618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (713606425686).

556764384618 is an abundant number, since it is smaller than the sum of its proper divisors (870448466754).

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

556764384618 is a wasteful number, since it uses less digits than its factorization.

556764384618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914838 (or 914812 counting only the distinct ones).

The product of its digits is 116121600, while the sum is 63.

The spelling of 556764384618 in words is "five hundred fifty-six billion, seven hundred sixty-four million, three hundred eighty-four thousand, six hundred eighteen".