856676805 has 16 divisors (see below), whose sum is σ = 1376149824. Its totient is φ = 455072000.

The previous prime is 856676773. The next prime is 856676809. The reversal of 856676805 is 508676658.

It is not a de Polignac number, because 856676805 - 2⁵ = 856676773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856676809) 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, 110004 + ... + 117533.

It is an arithmetic number, because the mean of its divisors is an integer number (86009364).

Almost surely, 2^856676805 is an apocalyptic number.

It is an amenable number.

856676805 is a deficient number, since it is larger than the sum of its proper divisors (519473019).

856676805 is a wasteful number, since it uses less digits than its factorization.

856676805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227796.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The square root of 856676805 is about 29269.0417506279. The cubic root of 856676805 is about 949.7420555462.

The spelling of 856676805 in words is "eight hundred fifty-six million, six hundred seventy-six thousand, eight hundred five".