6378281009 has 2 divisors, whose sum is σ = 6378281010. Its totient is φ = 6378281008.

The previous prime is 6378280991. The next prime is 6378281047. The reversal of 6378281009 is 9001828736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5026101025 + 1352179984 = 70895^2 + 36772^2 .

It is a cyclic number.

It is not a de Polignac number, because 6378281009 - 2²⁴ = 6361503793 is a prime.

It is not a weakly prime, because it can be changed into another prime (6378281059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3189140504 + 3189140505.

It is an arithmetic number, because the mean of its divisors is an integer number (3189140505).

Almost surely, 2^6378281009 is an apocalyptic number.

It is an amenable number.

6378281009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6378281009 is an equidigital number, since it uses as much as digits as its factorization.

6378281009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 6378281009 is about 79864.1409457336. The cubic root of 6378281009 is about 1854.5329318136.

The spelling of 6378281009 in words is "six billion, three hundred seventy-eight million, two hundred eighty-one thousand, nine".