38648549993 has 2 divisors, whose sum is σ = 38648549994. Its totient is φ = 38648549992.

The previous prime is 38648549987. The next prime is 38648550041. The reversal of 38648549993 is 39994584683.

38648549993 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., 38646841744 + 1708249 = 196588^2 + 1307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38648549993 is a prime.

It is a super-2 number, since 2×38648549993² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (38648549903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19324274996 + 19324274997.

It is an arithmetic number, because the mean of its divisors is an integer number (19324274997).

Almost surely, 2^38648549993 is an apocalyptic number.

It is an amenable number.

38648549993 is a deficient number, since it is larger than the sum of its proper divisors (1).

38648549993 is an equidigital number, since it uses as much as digits as its factorization.

38648549993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201553920, while the sum is 68.

The spelling of 38648549993 in words is "thirty-eight billion, six hundred forty-eight million, five hundred forty-nine thousand, nine hundred ninety-three".