81741000163 has 2 divisors, whose sum is σ = 81741000164. Its totient is φ = 81741000162.

The previous prime is 81741000151. The next prime is 81741000241. The reversal of 81741000163 is 36100014718.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81741000163 - 2⁹ = 81740999651 is a prime.

It is a super-2 number, since 2×81741000163² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (81741000463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40870500081 + 40870500082.

It is an arithmetic number, because the mean of its divisors is an integer number (40870500082).

Almost surely, 2^81741000163 is an apocalyptic number.

81741000163 is a deficient number, since it is larger than the sum of its proper divisors (1).

81741000163 is an equidigital number, since it uses as much as digits as its factorization.

81741000163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 81741000163 in words is "eighty-one billion, seven hundred forty-one million, one hundred sixty-three", and thus it is an aban number.