556638653 has 4 divisors (see below), whose sum is σ = 556705500. Its totient is φ = 556571808.

The previous prime is 556638647. The next prime is 556638659. The reversal of 556638653 is 356836655.

556638653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (556638647) and next prime (556638659).

It can be written as a sum of positive squares in 2 ways, for example, as 39212644 + 517426009 = 6262^2 + 22747^2 .

It is a cyclic number.

It is not a de Polignac number, because 556638653 - 2⁴ = 556638637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 556638598 and 556638607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556638659) 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, 18800 + ... + 38297.

It is an arithmetic number, because the mean of its divisors is an integer number (139176375).

Almost surely, 2^556638653 is an apocalyptic number.

It is an amenable number.

556638653 is a deficient number, since it is larger than the sum of its proper divisors (66847).

556638653 is an equidigital number, since it uses as much as digits as its factorization.

556638653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66846.

The product of its digits is 1944000, while the sum is 47.

The square root of 556638653 is about 23593.1908185391. The cubic root of 556638653 is about 822.6045742444.

The spelling of 556638653 in words is "five hundred fifty-six million, six hundred thirty-eight thousand, six hundred fifty-three".