199792723104181 has 2 divisors, whose sum is σ = 199792723104182. Its totient is φ = 199792723104180.

The previous prime is 199792723104131. The next prime is 199792723104187. The reversal of 199792723104181 is 181401327297991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107222732135281 + 92569990968900 = 10354841^2 + 9621330^2 .

It is an emirp because it is prime and its reverse (181401327297991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199792723104181 - 2⁹ = 199792723103669 is a prime.

It is a super-2 number, since 2×199792723104181² (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 (199792723104187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99896361552090 + 99896361552091.

It is an arithmetic number, because the mean of its divisors is an integer number (99896361552091).

Almost surely, 2^{199792723104181} is an apocalyptic number.

It is an amenable number.

199792723104181 is a deficient number, since it is larger than the sum of its proper divisors (1).

199792723104181 is an equidigital number, since it uses as much as digits as its factorization.

199792723104181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 64.

The spelling of 199792723104181 in words is "one hundred ninety-nine trillion, seven hundred ninety-two billion, seven hundred twenty-three million, one hundred four thousand, one hundred eighty-one".