856307943266 has 32 divisors (see below), whose sum is σ = 1357742131200. Its totient is φ = 404215091280.

The previous prime is 856307943263. The next prime is 856307943287. The reversal of 856307943266 is 662349703658.

It is a happy number.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (856307943263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10902845 + ... + 10981103.

It is an arithmetic number, because the mean of its divisors is an integer number (42429441600).

Almost surely, 2^856307943266 is an apocalyptic number.

856307943266 is a deficient number, since it is larger than the sum of its proper divisors (501434187934).

856307943266 is a wasteful number, since it uses less digits than its factorization.

856307943266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81374.

The product of its (nonzero) digits is 39191040, while the sum is 59.

The spelling of 856307943266 in words is "eight hundred fifty-six billion, three hundred seven million, nine hundred forty-three thousand, two hundred sixty-six".