856210571140 has 12 divisors (see below), whose sum is σ = 1798042199436. Its totient is φ = 342484228448.

The previous prime is 856210571129. The next prime is 856210571147. The reversal of 856210571140 is 41175012658.

It can be written as a sum of positive squares in 2 ways, for example, as 454213994116 + 401996577024 = 673954^2 + 634032^2 .

It is a junction number, because it is equal to n+sod(n) for n = 856210571093 and 856210571102.

It is not an unprimeable number, because it can be changed into a prime (856210571147) by changing a digit.

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, 21405264259 + ... + 21405264298.

It is an arithmetic number, because the mean of its divisors is an integer number (149836849953).

Almost surely, 2^856210571140 is an apocalyptic number.

It is an amenable number.

856210571140 is an abundant number, since it is smaller than the sum of its proper divisors (941831628296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856210571140 is a wasteful number, since it uses less digits than its factorization.

856210571140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42810528566 (or 42810528564 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

Adding to 856210571140 its reverse (41175012658), we get a palindrome (897385583798).

The spelling of 856210571140 in words is "eight hundred fifty-six billion, two hundred ten million, five hundred seventy-one thousand, one hundred forty".