6816939157317 has 4 divisors (see below), whose sum is σ = 9089252209760. Its totient is φ = 4544626104876.

The previous prime is 6816939157307. The next prime is 6816939157351. The reversal of 6816939157317 is 7137519396186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6816939157317 - 2¹⁴ = 6816939140933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6816939157307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136156526217 + ... + 1136156526222.

It is an arithmetic number, because the mean of its divisors is an integer number (2272313052440).

Almost surely, 2^{6816939157317} is an apocalyptic number.

It is an amenable number.

6816939157317 is a deficient number, since it is larger than the sum of its proper divisors (2272313052443).

6816939157317 is a wasteful number, since it uses less digits than its factorization.

6816939157317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272313052442.

The product of its digits is 51438240, while the sum is 66.

The spelling of 6816939157317 in words is "six trillion, eight hundred sixteen billion, nine hundred thirty-nine million, one hundred fifty-seven thousand, three hundred seventeen".