4645387181 has 2 divisors, whose sum is σ = 4645387182. Its totient is φ = 4645387180.

The previous prime is 4645387163. The next prime is 4645387189. The reversal of 4645387181 is 1817835464.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2496601156 + 2148786025 = 49966^2 + 46355^2 .

It is a cyclic number.

It is not a de Polignac number, because 4645387181 - 2²² = 4641192877 is a prime.

It is a super-2 number, since 2×4645387181² = 43159244122798253522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4645387189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322693590 + 2322693591.

It is an arithmetic number, because the mean of its divisors is an integer number (2322693591).

Almost surely, 2^4645387181 is an apocalyptic number.

It is an amenable number.

4645387181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4645387181 is an equidigital number, since it uses as much as digits as its factorization.

4645387181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 47.

The square root of 4645387181 is about 68157.0772627465. The cubic root of 4645387181 is about 1668.5554315628. Note that the first 3 decimals are identical.

The spelling of 4645387181 in words is "four billion, six hundred forty-five million, three hundred eighty-seven thousand, one hundred eighty-one".