6856381351 has 8 divisors (see below), whose sum is σ = 7172886240. Its totient is φ = 6541409952.

The previous prime is 6856381339. The next prime is 6856381369. The reversal of 6856381351 is 1531836586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6856381351 - 2⁵ = 6856381319 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 (6856381331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374220 + ... + 392113.

It is an arithmetic number, because the mean of its divisors is an integer number (896610780).

Almost surely, 2^6856381351 is an apocalyptic number.

6856381351 is a deficient number, since it is larger than the sum of its proper divisors (316504889).

6856381351 is a wasteful number, since it uses less digits than its factorization.

6856381351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766745.

The product of its digits is 518400, while the sum is 46.

The square root of 6856381351 is about 82803.2689632481. The cubic root of 6856381351 is about 1899.7581733774.

The spelling of 6856381351 in words is "six billion, eight hundred fifty-six million, three hundred eighty-one thousand, three hundred fifty-one".