64543666163 has 2 divisors, whose sum is σ = 64543666164. Its totient is φ = 64543666162.

The previous prime is 64543666151. The next prime is 64543666193. The reversal of 64543666163 is 36166634546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64543666163 - 2¹² = 64543662067 is a prime.

It is a super-2 number, since 2×64543666163² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64543666123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32271833081 + 32271833082.

It is an arithmetic number, because the mean of its divisors is an integer number (32271833082).

Almost surely, 2^64543666163 is an apocalyptic number.

64543666163 is a deficient number, since it is larger than the sum of its proper divisors (1).

64543666163 is an equidigital number, since it uses as much as digits as its factorization.

64543666163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 50.

The spelling of 64543666163 in words is "sixty-four billion, five hundred forty-three million, six hundred sixty-six thousand, one hundred sixty-three".