4678648181 has 2 divisors, whose sum is σ = 4678648182. Its totient is φ = 4678648180.

The previous prime is 4678648171. The next prime is 4678648223. The reversal of 4678648181 is 1818468764.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2463533956 + 2215114225 = 49634^2 + 47065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4678648181 is a prime.

It is a super-2 number, since 2×4678648181² = 43779497603149217522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4678648171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2339324090 + 2339324091.

It is an arithmetic number, because the mean of its divisors is an integer number (2339324091).

Almost surely, 2^4678648181 is an apocalyptic number.

It is an amenable number.

4678648181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4678648181 is an equidigital number, since it uses as much as digits as its factorization.

4678648181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2064384, while the sum is 53.

The square root of 4678648181 is about 68400.6445949159. The cubic root of 4678648181 is about 1672.5282537421.

The spelling of 4678648181 in words is "four billion, six hundred seventy-eight million, six hundred forty-eight thousand, one hundred eighty-one".