163886656613 has 2 divisors, whose sum is σ = 163886656614. Its totient is φ = 163886656612.

The previous prime is 163886656579. The next prime is 163886656631. The reversal of 163886656613 is 316656688361.

163886656613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (163886656631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158214608644 + 5672047969 = 397762^2 + 75313^2 .

It is a cyclic number.

It is not a de Polignac number, because 163886656613 - 2⁸ = 163886656357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163886656513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81943328306 + 81943328307.

It is an arithmetic number, because the mean of its divisors is an integer number (81943328307).

Almost surely, 2^163886656613 is an apocalyptic number.

It is an amenable number.

163886656613 is a deficient number, since it is larger than the sum of its proper divisors (1).

163886656613 is an equidigital number, since it uses as much as digits as its factorization.

163886656613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 59.

The spelling of 163886656613 in words is "one hundred sixty-three billion, eight hundred eighty-six million, six hundred fifty-six thousand, six hundred thirteen".