163564334393 has 2 divisors, whose sum is σ = 163564334394. Its totient is φ = 163564334392.

The previous prime is 163564334359. The next prime is 163564334407. The reversal of 163564334393 is 393433465361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158298945424 + 5265388969 = 397868^2 + 72563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163564334393 is a prime.

It is not a weakly prime, because it can be changed into another prime (163564330393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81782167196 + 81782167197.

It is an arithmetic number, because the mean of its divisors is an integer number (81782167197).

Almost surely, 2^163564334393 is an apocalyptic number.

It is an amenable number.

163564334393 is a deficient number, since it is larger than the sum of its proper divisors (1).

163564334393 is an equidigital number, since it uses as much as digits as its factorization.

163564334393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6298560, while the sum is 50.

The spelling of 163564334393 in words is "one hundred sixty-three billion, five hundred sixty-four million, three hundred thirty-four thousand, three hundred ninety-three".