6851791939013 has 4 divisors (see below), whose sum is σ = 7830619358880. Its totient is φ = 5872964519148.

The previous prime is 6851791938961. The next prime is 6851791939019. The reversal of 6851791939013 is 3109391971586.

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 a cyclic number.

It is not a de Polignac number, because 6851791939013 - 2¹² = 6851791934917 is a prime.

It is a super-2 number, since 2×6851791939013² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6851791939019) 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, 489413709923 + ... + 489413709936.

It is an arithmetic number, because the mean of its divisors is an integer number (1957654839720).

Almost surely, 2^{6851791939013} is an apocalyptic number.

It is an amenable number.

6851791939013 is a deficient number, since it is larger than the sum of its proper divisors (978827419867).

6851791939013 is an equidigital number, since it uses as much as digits as its factorization.

6851791939013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978827419866.

The product of its (nonzero) digits is 11022480, while the sum is 62.

The spelling of 6851791939013 in words is "six trillion, eight hundred fifty-one billion, seven hundred ninety-one million, nine hundred thirty-nine thousand, thirteen".