856218041823 has 16 divisors (see below), whose sum is σ = 1184556624896. Its totient is φ = 549536555520.

The previous prime is 856218041773. The next prime is 856218041867. The reversal of 856218041823 is 328140812658.

It is not a de Polignac number, because 856218041823 - 2²¹ = 856215944671 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 (856218001823) 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, 23833465 + ... + 23869362.

It is an arithmetic number, because the mean of its divisors is an integer number (74034789056).

Almost surely, 2^856218041823 is an apocalyptic number.

856218041823 is a deficient number, since it is larger than the sum of its proper divisors (328338583073).

856218041823 is a wasteful number, since it uses less digits than its factorization.

856218041823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47703054.

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 856218041823 in words is "eight hundred fifty-six billion, two hundred eighteen million, forty-one thousand, eight hundred twenty-three".