81707316982223 has 2 divisors, whose sum is σ = 81707316982224. Its totient is φ = 81707316982222.

The previous prime is 81707316982199. The next prime is 81707316982259. The reversal of 81707316982223 is 32228961370718.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81707316982223 - 2³² = 81703022014927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81707316981223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40853658491111 + 40853658491112.

It is an arithmetic number, because the mean of its divisors is an integer number (40853658491112).

Almost surely, 2^{81707316982223} is an apocalyptic number.

81707316982223 is a deficient number, since it is larger than the sum of its proper divisors (1).

81707316982223 is an equidigital number, since it uses as much as digits as its factorization.

81707316982223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 81707316982223 in words is "eighty-one trillion, seven hundred seven billion, three hundred sixteen million, nine hundred eighty-two thousand, two hundred twenty-three".