856353945 has 16 divisors (see below), whose sum is σ = 1370678400. Its totient is φ = 456551424.

The previous prime is 856353941. The next prime is 856353947. The reversal of 856353945 is 549353658.

856353945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 856353945 - 2² = 856353941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 856353894 and 856353903.

It is not an unprimeable number, because it can be changed into a prime (856353941) 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, 37956 + ... + 56154.

It is an arithmetic number, because the mean of its divisors is an integer number (85667400).

Almost surely, 2^856353945 is an apocalyptic number.

It is an amenable number.

856353945 is a deficient number, since it is larger than the sum of its proper divisors (514324455).

856353945 is a wasteful number, since it uses less digits than its factorization.

856353945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21344.

The product of its digits is 1944000, while the sum is 48.

The square root of 856353945 is about 29263.5258470335. The cubic root of 856353945 is about 949.6227292351.

The spelling of 856353945 in words is "eight hundred fifty-six million, three hundred fifty-three thousand, nine hundred forty-five".