5018161861 has 2 divisors, whose sum is σ = 5018161862. Its totient is φ = 5018161860.

The previous prime is 5018161853. The next prime is 5018161867. The reversal of 5018161861 is 1681618105.

5018161861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4357980225 + 660181636 = 66015^2 + 25694^2 .

It is a cyclic number.

It is not a de Polignac number, because 5018161861 - 2³ = 5018161853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5018161861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5018161867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2509080930 + 2509080931.

It is an arithmetic number, because the mean of its divisors is an integer number (2509080931).

Almost surely, 2^5018161861 is an apocalyptic number.

It is an amenable number.

5018161861 is a deficient number, since it is larger than the sum of its proper divisors (1).

5018161861 is an equidigital number, since it uses as much as digits as its factorization.

5018161861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 5018161861 is about 70838.9854599852. The cubic root of 5018161861 is about 1712.0438679047.

Adding to 5018161861 its reverse (1681618105), we get a palindrome (6699779966).

The spelling of 5018161861 in words is "five billion, eighteen million, one hundred sixty-one thousand, eight hundred sixty-one".