855716885 has 4 divisors (see below), whose sum is σ = 1026860268. Its totient is φ = 684573504.

The previous prime is 855716881. The next prime is 855716887. The reversal of 855716885 is 588617558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588617558 = 2 ⋅294308779.

It can be written as a sum of positive squares in 2 ways, for example, as 362255089 + 493461796 = 19033^2 + 22214^2 .

It is a cyclic number.

It is not a de Polignac number, because 855716885 - 2² = 855716881 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 (855716881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85571684 + ... + 85571693.

It is an arithmetic number, because the mean of its divisors is an integer number (256715067).

Almost surely, 2^855716885 is an apocalyptic number.

It is an amenable number.

855716885 is a deficient number, since it is larger than the sum of its proper divisors (171143383).

855716885 is a wasteful number, since it uses less digits than its factorization.

855716885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171143382.

The product of its digits is 2688000, while the sum is 53.

The square root of 855716885 is about 29252.6389407862. The cubic root of 855716885 is about 949.3871892704.

The spelling of 855716885 in words is "eight hundred fifty-five million, seven hundred sixteen thousand, eight hundred eighty-five".