6394081543 has 2 divisors, whose sum is σ = 6394081544. Its totient is φ = 6394081542.

The previous prime is 6394081493. The next prime is 6394081613. The reversal of 6394081543 is 3451804936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6394081543 - 2¹³ = 6394073351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6394081543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6394081843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3197040771 + 3197040772.

It is an arithmetic number, because the mean of its divisors is an integer number (3197040772).

Almost surely, 2^6394081543 is an apocalyptic number.

6394081543 is a deficient number, since it is larger than the sum of its proper divisors (1).

6394081543 is an equidigital number, since it uses as much as digits as its factorization.

6394081543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 6394081543 is about 79963.0010880032. The cubic root of 6394081543 is about 1856.0630435220.

The spelling of 6394081543 in words is "six billion, three hundred ninety-four million, eighty-one thousand, five hundred forty-three".