81707317113203 has 2 divisors, whose sum is σ = 81707317113204. Its totient is φ = 81707317113202.

The previous prime is 81707317113193. The next prime is 81707317113277. The reversal of 81707317113203 is 30231171370718.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81707317113203 - 2²⁶ = 81707250004339 is a prime.

It is not a weakly prime, because it can be changed into another prime (81707317113293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40853658556601 + 40853658556602.

It is an arithmetic number, because the mean of its divisors is an integer number (40853658556602).

Almost surely, 2^{81707317113203} is an apocalyptic number.

81707317113203 is a deficient number, since it is larger than the sum of its proper divisors (1).

81707317113203 is an equidigital number, since it uses as much as digits as its factorization.

81707317113203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 44.

The spelling of 81707317113203 in words is "eighty-one trillion, seven hundred seven billion, three hundred seventeen million, one hundred thirteen thousand, two hundred three".