181364676777773 has 2 divisors, whose sum is σ = 181364676777774. Its totient is φ = 181364676777772.

The previous prime is 181364676777667. The next prime is 181364676777827. The reversal of 181364676777773 is 377777676463181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163635212832004 + 17729463945769 = 12791998^2 + 4210637^2 .

It is a cyclic number.

It is not a de Polignac number, because 181364676777773 - 2²⁸ = 181364408342317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181364676747773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90682338388886 + 90682338388887.

It is an arithmetic number, because the mean of its divisors is an integer number (90682338388887).

Almost surely, 2^{181364676777773} is an apocalyptic number.

It is an amenable number.

181364676777773 is a deficient number, since it is larger than the sum of its proper divisors (1).

181364676777773 is an equidigital number, since it uses as much as digits as its factorization.

181364676777773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7318708992, while the sum is 80.

The spelling of 181364676777773 in words is "one hundred eighty-one trillion, three hundred sixty-four billion, six hundred seventy-six million, seven hundred seventy-seven thousand, seven hundred seventy-three".