39388668481 has 2 divisors, whose sum is σ = 39388668482. Its totient is φ = 39388668480.

The previous prime is 39388668467. The next prime is 39388668491. The reversal of 39388668481 is 18486688393.

39388668481 is digitally balanced in base 2, 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., 31954780081 + 7433888400 = 178759^2 + 86220^2 .

It is a cyclic number.

It is not a de Polignac number, because 39388668481 - 2⁷ = 39388668353 is a prime.

It is a super-3 number, since 3×39388668481³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (39388668421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19694334240 + 19694334241.

It is an arithmetic number, because the mean of its divisors is an integer number (19694334241).

Almost surely, 2^39388668481 is an apocalyptic number.

It is an amenable number.

39388668481 is a deficient number, since it is larger than the sum of its proper divisors (1).

39388668481 is an equidigital number, since it uses as much as digits as its factorization.

39388668481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47775744, while the sum is 64.

The spelling of 39388668481 in words is "thirty-nine billion, three hundred eighty-eight million, six hundred sixty-eight thousand, four hundred eighty-one".