81707316982199 has 2 divisors, whose sum is σ = 81707316982200. Its totient is φ = 81707316982198.

The previous prime is 81707316982177. The next prime is 81707316982223. The reversal of 81707316982199 is 99128961370718.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81707316982199 - 2²⁰ = 81707315933623 is a prime.

It is a super-4 number, since 4×81707316982199⁴ (a number of 57 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81707316982129) 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, 40853658491099 + 40853658491100.

It is an arithmetic number, because the mean of its divisors is an integer number (40853658491100).

Almost surely, 2^{81707316982199} is an apocalyptic number.

81707316982199 is a deficient number, since it is larger than the sum of its proper divisors (1).

81707316982199 is an equidigital number, since it uses as much as digits as its factorization.

81707316982199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82301184, while the sum is 71.

The spelling of 81707316982199 in words is "eighty-one trillion, seven hundred seven billion, three hundred sixteen million, nine hundred eighty-two thousand, one hundred ninety-nine".