38963818849 has 2 divisors, whose sum is σ = 38963818850. Its totient is φ = 38963818848.

The previous prime is 38963818847. The next prime is 38963818969. The reversal of 38963818849 is 94881836983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34349062225 + 4614756624 = 185335^2 + 67932^2 .

It is a cyclic number.

It is not a de Polignac number, because 38963818849 - 2¹ = 38963818847 is a prime.

Together with 38963818847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38963818841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19481909424 + 19481909425.

It is an arithmetic number, because the mean of its divisors is an integer number (19481909425).

Almost surely, 2^38963818849 is an apocalyptic number.

It is an amenable number.

38963818849 is a deficient number, since it is larger than the sum of its proper divisors (1).

38963818849 is an equidigital number, since it uses as much as digits as its factorization.

38963818849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71663616, while the sum is 67.

The spelling of 38963818849 in words is "thirty-eight billion, nine hundred sixty-three million, eight hundred eighteen thousand, eight hundred forty-nine".