38678390489 has 2 divisors, whose sum is σ = 38678390490. Its totient is φ = 38678390488.

The previous prime is 38678390483. The next prime is 38678390507. The reversal of 38678390489 is 98409387683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26071592089 + 12606798400 = 161467^2 + 112280^2 .

It is a cyclic number.

It is not a de Polignac number, because 38678390489 - 2²⁴ = 38661613273 is a prime.

It is not a weakly prime, because it can be changed into another prime (38678390483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19339195244 + 19339195245.

It is an arithmetic number, because the mean of its divisors is an integer number (19339195245).

Almost surely, 2^38678390489 is an apocalyptic number.

It is an amenable number.

38678390489 is a deficient number, since it is larger than the sum of its proper divisors (1).

38678390489 is an equidigital number, since it uses as much as digits as its factorization.

38678390489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62705664, while the sum is 65.

The spelling of 38678390489 in words is "thirty-eight billion, six hundred seventy-eight million, three hundred ninety thousand, four hundred eighty-nine".