38678390449 has 2 divisors, whose sum is σ = 38678390450. Its totient is φ = 38678390448.

The previous prime is 38678390407. The next prime is 38678390453. The reversal of 38678390449 is 94409387683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36063909025 + 2614481424 = 189905^2 + 51132^2 .

It is a cyclic number.

It is not a de Polignac number, because 38678390449 - 2⁷ = 38678390321 is a prime.

It is not a weakly prime, because it can be changed into another prime (38678390489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19339195224 + 19339195225.

It is an arithmetic number, because the mean of its divisors is an integer number (19339195225).

Almost surely, 2^38678390449 is an apocalyptic number.

It is an amenable number.

38678390449 is a deficient number, since it is larger than the sum of its proper divisors (1).

38678390449 is an equidigital number, since it uses as much as digits as its factorization.

38678390449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 38678390449 in words is "thirty-eight billion, six hundred seventy-eight million, three hundred ninety thousand, four hundred forty-nine".