6839390645871 has 16 divisors (see below), whose sum is σ = 10422138902784. Its totient is φ = 3908144363904.

The previous prime is 6839390645819. The next prime is 6839390645873. The reversal of 6839390645871 is 1785460939386.

It is not a de Polignac number, because 6839390645871 - 2²³ = 6839382257263 is a prime.

It is a super-3 number, since 3×6839390645871³ (a number of 39 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6839390645796 and 6839390645805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6839390645873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2212285 + ... + 4309638.

It is an arithmetic number, because the mean of its divisors is an integer number (651383681424).

Almost surely, 2^{6839390645871} is an apocalyptic number.

6839390645871 is a deficient number, since it is larger than the sum of its proper divisors (3582748256913).

6839390645871 is a wasteful number, since it uses less digits than its factorization.

6839390645871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6571870.

The product of its (nonzero) digits is 235146240, while the sum is 69.

The spelling of 6839390645871 in words is "six trillion, eight hundred thirty-nine billion, three hundred ninety million, six hundred forty-five thousand, eight hundred seventy-one".