628556563 has 2 divisors, whose sum is σ = 628556564. Its totient is φ = 628556562.

The previous prime is 628556549. The next prime is 628556597. The reversal of 628556563 is 365655826.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628556563 is a prime.

It is not a weakly prime, because it can be changed into another prime (628556503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314278281 + 314278282.

It is an arithmetic number, because the mean of its divisors is an integer number (314278282).

Almost surely, 2^628556563 is an apocalyptic number.

628556563 is a deficient number, since it is larger than the sum of its proper divisors (1).

628556563 is an equidigital number, since it uses as much as digits as its factorization.

628556563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296000, while the sum is 46.

The square root of 628556563 is about 25071.0303537768. The cubic root of 628556563 is about 856.6066767145.

The spelling of 628556563 in words is "six hundred twenty-eight million, five hundred fifty-six thousand, five hundred sixty-three".