163886656631 has 2 divisors, whose sum is σ = 163886656632. Its totient is φ = 163886656630.

The previous prime is 163886656613. The next prime is 163886656651. The reversal of 163886656631 is 136656688361.

Together with previous prime (163886656613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163886656631 is a prime.

It is a super-2 number, since 2×163886656631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163886656651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81943328315 + 81943328316.

It is an arithmetic number, because the mean of its divisors is an integer number (81943328316).

Almost surely, 2^163886656631 is an apocalyptic number.

163886656631 is a deficient number, since it is larger than the sum of its proper divisors (1).

163886656631 is an equidigital number, since it uses as much as digits as its factorization.

163886656631 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 163886656631 in words is "one hundred sixty-three billion, eight hundred eighty-six million, six hundred fifty-six thousand, six hundred thirty-one".