318877161181 has 2 divisors, whose sum is σ = 318877161182. Its totient is φ = 318877161180.

The previous prime is 318877161179. The next prime is 318877161263. The reversal of 318877161181 is 181161778813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316396125081 + 2481036100 = 562491^2 + 49810^2 .

It is a cyclic number.

It is not a de Polignac number, because 318877161181 - 2¹ = 318877161179 is a prime.

It is a super-2 number, since 2×318877161181² (a number of 24 digits) contains 22 as substring.

Together with 318877161179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318877161121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159438580590 + 159438580591.

It is an arithmetic number, because the mean of its divisors is an integer number (159438580591).

Almost surely, 2^318877161181 is an apocalyptic number.

It is an amenable number.

318877161181 is a deficient number, since it is larger than the sum of its proper divisors (1).

318877161181 is an equidigital number, since it uses as much as digits as its factorization.

318877161181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 52.

The spelling of 318877161181 in words is "three hundred eighteen billion, eight hundred seventy-seven million, one hundred sixty-one thousand, one hundred eighty-one".