81268186342183 has 2 divisors, whose sum is σ = 81268186342184. Its totient is φ = 81268186342182.

The previous prime is 81268186342177. The next prime is 81268186342219. The reversal of 81268186342183 is 38124368186218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81268186342183 - 2⁵ = 81268186342151 is a prime.

It is a super-2 number, since 2×81268186342183² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81268186346183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40634093171091 + 40634093171092.

It is an arithmetic number, because the mean of its divisors is an integer number (40634093171092).

Almost surely, 2^{81268186342183} is an apocalyptic number.

81268186342183 is a deficient number, since it is larger than the sum of its proper divisors (1).

81268186342183 is an equidigital number, since it uses as much as digits as its factorization.

81268186342183 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21233664, while the sum is 61.

The spelling of 81268186342183 in words is "eighty-one trillion, two hundred sixty-eight billion, one hundred eighty-six million, three hundred forty-two thousand, one hundred eighty-three".