181782105793 has 2 divisors, whose sum is σ = 181782105794. Its totient is φ = 181782105792.

The previous prime is 181782105773. The next prime is 181782105797. The reversal of 181782105793 is 397501287181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126581543089 + 55200562704 = 355783^2 + 234948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181782105793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 181782105793.

It is not a weakly prime, because it can be changed into another prime (181782105797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90891052896 + 90891052897.

It is an arithmetic number, because the mean of its divisors is an integer number (90891052897).

Almost surely, 2^181782105793 is an apocalyptic number.

It is an amenable number.

181782105793 is a deficient number, since it is larger than the sum of its proper divisors (1).

181782105793 is an equidigital number, since it uses as much as digits as its factorization.

181782105793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 52.

The spelling of 181782105793 in words is "one hundred eighty-one billion, seven hundred eighty-two million, one hundred five thousand, seven hundred ninety-three".