556989649 has 8 divisors (see below), whose sum is σ = 595594728. Its totient is φ = 519033600.

The previous prime is 556989647. The next prime is 556989721. The reversal of 556989649 is 946989655.

556989649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 317730625 + 239259024 = 17825^2 + 15468^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 556989649 - 2¹ = 556989647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556989647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160482 + ... + 163915.

It is an arithmetic number, because the mean of its divisors is an integer number (74449341).

Almost surely, 2^556989649 is an apocalyptic number.

It is an amenable number.

556989649 is a deficient number, since it is larger than the sum of its proper divisors (38605079).

556989649 is a wasteful number, since it uses less digits than its factorization.

556989649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324515.

The product of its digits is 20995200, while the sum is 61.

The square root of 556989649 is about 23600.6281484201. The cubic root of 556989649 is about 822.7774393800. Note that the first 3 decimals are identical.

The spelling of 556989649 in words is "five hundred fifty-six million, nine hundred eighty-nine thousand, six hundred forty-nine".