855716879 has 4 divisors (see below), whose sum is σ = 906053184. Its totient is φ = 805380576.

The previous prime is 855716867. The next prime is 855716881. The reversal of 855716879 is 978617558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978617558 = 2 ⋅489308779.

It is a de Polignac number, because none of the positive numbers 2^k-855716879 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 (855716179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25168127 + ... + 25168160.

It is an arithmetic number, because the mean of its divisors is an integer number (226513296).

Almost surely, 2^855716879 is an apocalyptic number.

855716879 is a deficient number, since it is larger than the sum of its proper divisors (50336305).

855716879 is a wasteful number, since it uses less digits than its factorization.

855716879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50336304.

The product of its digits is 4233600, while the sum is 56.

The square root of 855716879 is about 29252.6388382313. The cubic root of 855716879 is about 949.3871870515.

The spelling of 855716879 in words is "eight hundred fifty-five million, seven hundred sixteen thousand, eight hundred seventy-nine".