556038643 has 2 divisors, whose sum is σ = 556038644. Its totient is φ = 556038642.

The previous prime is 556038617. The next prime is 556038653. The reversal of 556038643 is 346830655.

556038643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556038643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 556038596 and 556038605.

It is not a weakly prime, because it can be changed into another prime (556038653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278019321 + 278019322.

It is an arithmetic number, because the mean of its divisors is an integer number (278019322).

Almost surely, 2^556038643 is an apocalyptic number.

556038643 is a deficient number, since it is larger than the sum of its proper divisors (1).

556038643 is an equidigital number, since it uses as much as digits as its factorization.

556038643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 556038643 is about 23580.4716449862. The cubic root of 556038643 is about 822.3089016287.

It can be divided in two parts, 55603 and 8643, that added together give a palindrome (64246).

The spelling of 556038643 in words is "five hundred fifty-six million, thirty-eight thousand, six hundred forty-three".