81793182289 has 32 divisors (see below), whose sum is σ = 106207073280. Its totient is φ = 61170437952.

The previous prime is 81793182227. The next prime is 81793182293. The reversal of 81793182289 is 98228139718.

It is not a de Polignac number, because 81793182289 - 2¹⁷ = 81793051217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81793182689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 712554 + ... + 819340.

It is an arithmetic number, because the mean of its divisors is an integer number (3318971040).

Almost surely, 2^81793182289 is an apocalyptic number.

It is an amenable number.

81793182289 is a deficient number, since it is larger than the sum of its proper divisors (24413890991).

81793182289 is a wasteful number, since it uses less digits than its factorization.

81793182289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107269.

The product of its digits is 3483648, while the sum is 58.

The spelling of 81793182289 in words is "eighty-one billion, seven hundred ninety-three million, one hundred eighty-two thousand, two hundred eighty-nine".