5238418681 has 2 divisors, whose sum is σ = 5238418682. Its totient is φ = 5238418680.

The previous prime is 5238418649. The next prime is 5238418697. The reversal of 5238418681 is 1868148325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5233220281 + 5198400 = 72341^2 + 2280^2 .

It is a cyclic number.

It is not a de Polignac number, because 5238418681 - 2⁵ = 5238418649 is a prime.

It is a super-2 number, since 2×5238418681² = 54882060554899559522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5238418481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2619209340 + 2619209341.

It is an arithmetic number, because the mean of its divisors is an integer number (2619209341).

Almost surely, 2^5238418681 is an apocalyptic number.

It is an amenable number.

5238418681 is a deficient number, since it is larger than the sum of its proper divisors (1).

5238418681 is an equidigital number, since it uses as much as digits as its factorization.

5238418681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 46.

The square root of 5238418681 is about 72376.9209140593. The cubic root of 5238418681 is about 1736.7343823927.

The spelling of 5238418681 in words is "five billion, two hundred thirty-eight million, four hundred eighteen thousand, six hundred eighty-one".