6428618563 has 2 divisors, whose sum is σ = 6428618564. Its totient is φ = 6428618562.

The previous prime is 6428618549. The next prime is 6428618569. The reversal of 6428618563 is 3658168246.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6428618563 - 2⁵ = 6428618531 is a prime.

It is not a weakly prime, because it can be changed into another prime (6428618569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3214309281 + 3214309282.

It is an arithmetic number, because the mean of its divisors is an integer number (3214309282).

Almost surely, 2^6428618563 is an apocalyptic number.

6428618563 is a deficient number, since it is larger than the sum of its proper divisors (1).

6428618563 is an equidigital number, since it uses as much as digits as its factorization.

6428618563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 49.

The square root of 6428618563 is about 80178.6665079933. Note that the first 3 decimals coincide. The cubic root of 6428618563 is about 1859.3988270856.

The spelling of 6428618563 in words is "six billion, four hundred twenty-eight million, six hundred eighteen thousand, five hundred sixty-three".