6563389979 has 2 divisors, whose sum is σ = 6563389980. Its totient is φ = 6563389978.

The previous prime is 6563389969. The next prime is 6563390017. The reversal of 6563389979 is 9799833656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6563389979 - 2²⁴ = 6546612763 is a prime.

It is not a weakly prime, because it can be changed into another prime (6563389909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3281694989 + 3281694990.

It is an arithmetic number, because the mean of its divisors is an integer number (3281694990).

Almost surely, 2^6563389979 is an apocalyptic number.

6563389979 is a deficient number, since it is larger than the sum of its proper divisors (1).

6563389979 is an equidigital number, since it uses as much as digits as its factorization.

6563389979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66134880, while the sum is 65.

The square root of 6563389979 is about 81014.7516135179. The cubic root of 6563389979 is about 1872.3027271270.

The spelling of 6563389979 in words is "six billion, five hundred sixty-three million, three hundred eighty-nine thousand, nine hundred seventy-nine".