163648631 has 2 divisors, whose sum is σ = 163648632. Its totient is φ = 163648630.

The previous prime is 163648627. The next prime is 163648649. The reversal of 163648631 is 136846361.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163648631 - 2² = 163648627 is a prime.

It is a super-2 number, since 2×163648631² = 53561748856348322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163648621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81824315 + 81824316.

It is an arithmetic number, because the mean of its divisors is an integer number (81824316).

Almost surely, 2^163648631 is an apocalyptic number.

163648631 is a deficient number, since it is larger than the sum of its proper divisors (1).

163648631 is an equidigital number, since it uses as much as digits as its factorization.

163648631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 163648631 is about 12792.5224643148. The cubic root of 163648631 is about 546.9791754129.

The spelling of 163648631 in words is "one hundred sixty-three million, six hundred forty-eight thousand, six hundred thirty-one".