181118688053 has 2 divisors, whose sum is σ = 181118688054. Its totient is φ = 181118688052.

The previous prime is 181118688001. The next prime is 181118688077. The reversal of 181118688053 is 350886811181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117020094724 + 64098593329 = 342082^2 + 253177^2 .

It is an emirp because it is prime and its reverse (350886811181) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181118688053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 181118687992 and 181118688010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181118688083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90559344026 + 90559344027.

It is an arithmetic number, because the mean of its divisors is an integer number (90559344027).

Almost surely, 2^181118688053 is an apocalyptic number.

It is an amenable number.

181118688053 is a deficient number, since it is larger than the sum of its proper divisors (1).

181118688053 is an equidigital number, since it uses as much as digits as its factorization.

181118688053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 368640, while the sum is 50.

The spelling of 181118688053 in words is "one hundred eighty-one billion, one hundred eighteen million, six hundred eighty-eight thousand, fifty-three".