38658685679 has 2 divisors, whose sum is σ = 38658685680. Its totient is φ = 38658685678.

The previous prime is 38658685649. The next prime is 38658685733. The reversal of 38658685679 is 97658685683.

38658685679 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-38658685679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38658685649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19329342839 + 19329342840.

It is an arithmetic number, because the mean of its divisors is an integer number (19329342840).

Almost surely, 2^38658685679 is an apocalyptic number.

38658685679 is a deficient number, since it is larger than the sum of its proper divisors (1).

38658685679 is an equidigital number, since it uses as much as digits as its factorization.

38658685679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 522547200, while the sum is 71.

The spelling of 38658685679 in words is "thirty-eight billion, six hundred fifty-eight million, six hundred eighty-five thousand, six hundred seventy-nine".