645245563163 has 2 divisors, whose sum is σ = 645245563164. Its totient is φ = 645245563162.

The previous prime is 645245563099. The next prime is 645245563169. The reversal of 645245563163 is 361365542546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645245563163 - 2⁶ = 645245563099 is a prime.

It is not a weakly prime, because it can be changed into another prime (645245563169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322622781581 + 322622781582.

It is an arithmetic number, because the mean of its divisors is an integer number (322622781582).

Almost surely, 2^645245563163 is an apocalyptic number.

645245563163 is a deficient number, since it is larger than the sum of its proper divisors (1).

645245563163 is an equidigital number, since it uses as much as digits as its factorization.

645245563163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776000, while the sum is 50.

The spelling of 645245563163 in words is "six hundred forty-five billion, two hundred forty-five million, five hundred sixty-three thousand, one hundred sixty-three".