81168485627 has 2 divisors, whose sum is σ = 81168485628. Its totient is φ = 81168485626.

The previous prime is 81168485611. The next prime is 81168485647. The reversal of 81168485627 is 72658486118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81168485627 - 2⁴ = 81168485611 is a prime.

It is not a weakly prime, because it can be changed into another prime (81168485647) 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, 40584242813 + 40584242814.

It is an arithmetic number, because the mean of its divisors is an integer number (40584242814).

Almost surely, 2^81168485627 is an apocalyptic number.

81168485627 is a deficient number, since it is larger than the sum of its proper divisors (1).

81168485627 is an equidigital number, since it uses as much as digits as its factorization.

81168485627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5160960, while the sum is 56.

The spelling of 81168485627 in words is "eighty-one billion, one hundred sixty-eight million, four hundred eighty-five thousand, six hundred twenty-seven".