556556642 has 8 divisors (see below), whose sum is σ = 883942956. Its totient is φ = 261908992.

The previous prime is 556556629. The next prime is 556556647. The reversal of 556556642 is 246655655.

It can be written as a sum of positive squares in 2 ways, for example, as 537729721 + 18826921 = 23189^2 + 4339^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 556556593 and 556556602.

It is not an unprimeable number, because it can be changed into a prime (556556647) 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 3 ways as a sum of consecutive naturals, for example, 8184623 + ... + 8184690.

Almost surely, 2^556556642 is an apocalyptic number.

556556642 is a deficient number, since it is larger than the sum of its proper divisors (327386314).

556556642 is a wasteful number, since it uses less digits than its factorization.

556556642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16369332.

The product of its digits is 1080000, while the sum is 44.

The square root of 556556642 is about 23591.4527318688. The cubic root of 556556642 is about 822.5641734465.

The spelling of 556556642 in words is "five hundred fifty-six million, five hundred fifty-six thousand, six hundred forty-two".