6840816194 has 4 divisors (see below), whose sum is σ = 10261224294. Its totient is φ = 3420408096.

The previous prime is 6840816181. The next prime is 6840816209. The reversal of 6840816194 is 4916180486.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3512103169 + 3328713025 = 59263^2 + 57695^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710204047 + ... + 1710204050.

Almost surely, 2^6840816194 is an apocalyptic number.

6840816194 is a deficient number, since it is larger than the sum of its proper divisors (3420408100).

6840816194 is a wasteful number, since it uses less digits than its factorization.

6840816194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420408099.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 6840816194 is about 82709.2267767025. The cubic root of 6840816194 is about 1898.3194922752.

The spelling of 6840816194 in words is "six billion, eight hundred forty million, eight hundred sixteen thousand, one hundred ninety-four".