38538718861 has 2 divisors, whose sum is σ = 38538718862. Its totient is φ = 38538718860.

The previous prime is 38538718843. The next prime is 38538718909. The reversal of 38538718861 is 16881783583.

It is a happy number.

38538718861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38536045636 + 2673225 = 196306^2 + 1635^2 .

It is a cyclic number.

It is not a de Polignac number, because 38538718861 - 2¹¹ = 38538716813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38538718796 and 38538718805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38538218861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19269359430 + 19269359431.

It is an arithmetic number, because the mean of its divisors is an integer number (19269359431).

Almost surely, 2^38538718861 is an apocalyptic number.

It is an amenable number.

38538718861 is a deficient number, since it is larger than the sum of its proper divisors (1).

38538718861 is an equidigital number, since it uses as much as digits as its factorization.

38538718861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 58.

The spelling of 38538718861 in words is "thirty-eight billion, five hundred thirty-eight million, seven hundred eighteen thousand, eight hundred sixty-one".