81468189059 has 2 divisors, whose sum is σ = 81468189060. Its totient is φ = 81468189058.

The previous prime is 81468189053. The next prime is 81468189067. The reversal of 81468189059 is 95098186418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81468189059 - 2⁴ = 81468189043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81468188989 and 81468189007.

It is not a weakly prime, because it can be changed into another prime (81468189053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40734094529 + 40734094530.

It is an arithmetic number, because the mean of its divisors is an integer number (40734094530).

Almost surely, 2^81468189059 is an apocalyptic number.

81468189059 is a deficient number, since it is larger than the sum of its proper divisors (1).

81468189059 is an equidigital number, since it uses as much as digits as its factorization.

81468189059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4976640, while the sum is 59.

The spelling of 81468189059 in words is "eighty-one billion, four hundred sixty-eight million, one hundred eighty-nine thousand, fifty-nine".