163886656651 has 2 divisors, whose sum is σ = 163886656652. Its totient is φ = 163886656650.

The previous prime is 163886656631. The next prime is 163886656727. The reversal of 163886656651 is 156656688361.

163886656651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (156656688361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163886656651 - 2¹⁵ = 163886623883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163886656651.

It is not a weakly prime, because it can be changed into another prime (163886656631) 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, 81943328325 + 81943328326.

It is an arithmetic number, because the mean of its divisors is an integer number (81943328326).

Almost surely, 2^163886656651 is an apocalyptic number.

163886656651 is a deficient number, since it is larger than the sum of its proper divisors (1).

163886656651 is an equidigital number, since it uses as much as digits as its factorization.

163886656651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37324800, while the sum is 61.

The spelling of 163886656651 in words is "one hundred sixty-three billion, eight hundred eighty-six million, six hundred fifty-six thousand, six hundred fifty-one".