856926861 has 16 divisors (see below), whose sum is σ = 1306379904. Its totient is φ = 489452544.

The previous prime is 856926859. The next prime is 856926869. The reversal of 856926861 is 168629658.

856926861 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 856926861 - 2¹ = 856926859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856926869) 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, 46585 + ... + 62321.

It is an arithmetic number, because the mean of its divisors is an integer number (81648744).

Almost surely, 2^856926861 is an apocalyptic number.

It is an amenable number.

856926861 is a deficient number, since it is larger than the sum of its proper divisors (449453043).

856926861 is a wasteful number, since it uses less digits than its factorization.

856926861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18340.

The product of its digits is 1244160, while the sum is 51.

The square root of 856926861 is about 29273.3131196317. The cubic root of 856926861 is about 949.8344535174.

The spelling of 856926861 in words is "eight hundred fifty-six million, nine hundred twenty-six thousand, eight hundred sixty-one".