6381379805149 has 2 divisors, whose sum is σ = 6381379805150. Its totient is φ = 6381379805148.

The previous prime is 6381379805089. The next prime is 6381379805173. The reversal of 6381379805149 is 9415089731836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5356794525625 + 1024585279524 = 2314475^2 + 1012218^2 .

It is a cyclic number.

It is not a de Polignac number, because 6381379805149 - 2¹⁵ = 6381379772381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6381379865149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3190689902574 + 3190689902575.

It is an arithmetic number, because the mean of its divisors is an integer number (3190689902575).

Almost surely, 2^{6381379805149} is an apocalyptic number.

It is an amenable number.

6381379805149 is a deficient number, since it is larger than the sum of its proper divisors (1).

6381379805149 is an equidigital number, since it uses as much as digits as its factorization.

6381379805149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39191040, while the sum is 64.

The spelling of 6381379805149 in words is "six trillion, three hundred eighty-one billion, three hundred seventy-nine million, eight hundred five thousand, one hundred forty-nine".