6840534863819 has 2 divisors, whose sum is σ = 6840534863820. Its totient is φ = 6840534863818.

The previous prime is 6840534863803. The next prime is 6840534863867. The reversal of 6840534863819 is 9183684350486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6840534863819 - 2⁴ = 6840534863803 is a prime.

It is a super-2 number, since 2×6840534863819² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6840534865819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3420267431909 + 3420267431910.

It is an arithmetic number, because the mean of its divisors is an integer number (3420267431910).

Almost surely, 2^{6840534863819} is an apocalyptic number.

6840534863819 is a deficient number, since it is larger than the sum of its proper divisors (1).

6840534863819 is an equidigital number, since it uses as much as digits as its factorization.

6840534863819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 119439360, while the sum is 65.

The spelling of 6840534863819 in words is "six trillion, eight hundred forty billion, five hundred thirty-four million, eight hundred sixty-three thousand, eight hundred nineteen".