38678390321 has 2 divisors, whose sum is σ = 38678390322. Its totient is φ = 38678390320.

The previous prime is 38678390273. The next prime is 38678390323. The reversal of 38678390321 is 12309387683.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35133378721 + 3545011600 = 187439^2 + 59540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38678390321 is a prime.

Together with 38678390323, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38678390321.

It is not a weakly prime, because it can be changed into another prime (38678390323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19339195160 + 19339195161.

It is an arithmetic number, because the mean of its divisors is an integer number (19339195161).

Almost surely, 2^38678390321 is an apocalyptic number.

It is an amenable number.

38678390321 is a deficient number, since it is larger than the sum of its proper divisors (1).

38678390321 is an equidigital number, since it uses as much as digits as its factorization.

38678390321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 38678390321 in words is "thirty-eight billion, six hundred seventy-eight million, three hundred ninety thousand, three hundred twenty-one".