856856852437 has 16 divisors (see below), whose sum is σ = 936608044032. Its totient is φ = 780371055360.

The previous prime is 856856852417. The next prime is 856856852443. The reversal of 856856852437 is 734258658658.

It is a cyclic number.

It is not a de Polignac number, because 856856852437 - 2¹¹ = 856856850389 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 (856856852417) 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, 6595368 + ... + 6724030.

It is an arithmetic number, because the mean of its divisors is an integer number (58538002752).

Almost surely, 2^856856852437 is an apocalyptic number.

It is an amenable number.

856856852437 is a deficient number, since it is larger than the sum of its proper divisors (79751191595).

856856852437 is a wasteful number, since it uses less digits than its factorization.

856856852437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141348.

The product of its digits is 387072000, while the sum is 67.

The spelling of 856856852437 in words is "eight hundred fifty-six billion, eight hundred fifty-six million, eight hundred fifty-two thousand, four hundred thirty-seven".