856493895 has 64 divisors (see below), whose sum is σ = 1478227968. Its totient is φ = 422400000.

The previous prime is 856493893. The next prime is 856493899. The reversal of 856493895 is 598394658.

856493895 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 856493895 - 2¹ = 856493893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856493893) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2135695 + ... + 2136095.

It is an arithmetic number, because the mean of its divisors is an integer number (23097312).

Almost surely, 2^856493895 is an apocalyptic number.

856493895 is a deficient number, since it is larger than the sum of its proper divisors (621734073).

856493895 is a wasteful number, since it uses less digits than its factorization.

856493895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624.

The product of its digits is 9331200, while the sum is 57.

The square root of 856493895 is about 29265.9169512934. The cubic root of 856493895 is about 949.6744572473.

The spelling of 856493895 in words is "eight hundred fifty-six million, four hundred ninety-three thousand, eight hundred ninety-five".