38648942639 has 2 divisors, whose sum is σ = 38648942640. Its totient is φ = 38648942638.

The previous prime is 38648942609. The next prime is 38648942681. The reversal of 38648942639 is 93624984683.

38648942639 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38648942639 is a prime.

It is a super-2 number, since 2×38648942639² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38648942609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19324471319 + 19324471320.

It is an arithmetic number, because the mean of its divisors is an integer number (19324471320).

Almost surely, 2^38648942639 is an apocalyptic number.

38648942639 is a deficient number, since it is larger than the sum of its proper divisors (1).

38648942639 is an equidigital number, since it uses as much as digits as its factorization.

38648942639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53747712, while the sum is 62.

The spelling of 38648942639 in words is "thirty-eight billion, six hundred forty-eight million, nine hundred forty-two thousand, six hundred thirty-nine".