856909184266 has 8 divisors (see below), whose sum is σ = 1285486072164. Its totient is φ = 428413826880.

The previous prime is 856909184227. The next prime is 856909184291. The reversal of 856909184266 is 662481909658.

It can be written as a sum of positive squares in 2 ways, for example, as 847992348225 + 8916836041 = 920865^2 + 94429^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 856909184198 and 856909184207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20356345 + ... + 20398396.

Almost surely, 2^856909184266 is an apocalyptic number.

856909184266 is a deficient number, since it is larger than the sum of its proper divisors (428576887898).

856909184266 is a wasteful number, since it uses less digits than its factorization.

856909184266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40765256.

The product of its (nonzero) digits is 44789760, while the sum is 64.

The spelling of 856909184266 in words is "eight hundred fifty-six billion, nine hundred nine million, one hundred eighty-four thousand, two hundred sixty-six".