81892397605741 has 2 divisors, whose sum is σ = 81892397605742. Its totient is φ = 81892397605740.

The previous prime is 81892397605729. The next prime is 81892397605783. The reversal of 81892397605741 is 14750679329818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80364429673641 + 1527967932100 = 8964621^2 + 1236110^2 .

It is a cyclic number.

It is not a de Polignac number, because 81892397605741 - 2⁹ = 81892397605229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81892397605721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40946198802870 + 40946198802871.

It is an arithmetic number, because the mean of its divisors is an integer number (40946198802871).

It is a 1-persistent number, because it is pandigital, but 2⋅81892397605741 = 163784795211482 is not.

Almost surely, 2^{81892397605741} is an apocalyptic number.

It is an amenable number.

81892397605741 is a deficient number, since it is larger than the sum of its proper divisors (1).

81892397605741 is an equidigital number, since it uses as much as digits as its factorization.

81892397605741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 182891520, while the sum is 70.

The spelling of 81892397605741 in words is "eighty-one trillion, eight hundred ninety-two billion, three hundred ninety-seven million, six hundred five thousand, seven hundred forty-one".