81707317113269 has 32 divisors (see below), whose sum is σ = 88540999430400. Its totient is φ = 75168360171520.

The previous prime is 81707317113203. The next prime is 81707317113277. The reversal of 81707317113269 is 96231171370718.

It is a cyclic number.

It is not a de Polignac number, because 81707317113269 - 2⁸ = 81707317113013 is a prime.

It is a super-2 number, since 2×81707317113269² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81707317113469) 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, 228444227 + ... + 228801615.

It is an arithmetic number, because the mean of its divisors is an integer number (2766906232200).

Almost surely, 2^{81707317113269} is an apocalyptic number.

It is an amenable number.

81707317113269 is a deficient number, since it is larger than the sum of its proper divisors (6833682317131).

81707317113269 is a wasteful number, since it uses less digits than its factorization.

81707317113269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358765.

The product of its (nonzero) digits is 2667168, while the sum is 56.

The spelling of 81707317113269 in words is "eighty-one trillion, seven hundred seven billion, three hundred seventeen million, one hundred thirteen thousand, two hundred sixty-nine".