6856145769 has 16 divisors (see below), whose sum is σ = 10242106560. Its totient is φ = 4042935360.

The previous prime is 6856145759. The next prime is 6856145797. The reversal of 6856145769 is 9675416586.

It is not a de Polignac number, because 6856145769 - 2⁴ = 6856145753 is a prime.

It is a super-2 number, since 2×6856145769² = 94013469611553202722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6856145759) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 2806374 + ... + 2808815.

It is an arithmetic number, because the mean of its divisors is an integer number (640131660).

Almost surely, 2^6856145769 is an apocalyptic number.

It is an amenable number.

6856145769 is a deficient number, since it is larger than the sum of its proper divisors (3385960791).

6856145769 is a wasteful number, since it uses less digits than its factorization.

6856145769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5615240.

The product of its digits is 10886400, while the sum is 57.

The square root of 6856145769 is about 82801.8464105723. The cubic root of 6856145769 is about 1899.7364148660.

The spelling of 6856145769 in words is "six billion, eight hundred fifty-six million, one hundred forty-five thousand, seven hundred sixty-nine".