855856834841 has 4 divisors (see below), whose sum is σ = 855868641972. Its totient is φ = 855845027712.

The previous prime is 855856834787. The next prime is 855856834843. The reversal of 855856834841 is 148438658558.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 540844047241 + 315012787600 = 735421^2 + 561260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855856834841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (855856834843) 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, 5794160 + ... + 5940033.

It is an arithmetic number, because the mean of its divisors is an integer number (213967160493).

Almost surely, 2^855856834841 is an apocalyptic number.

It is an amenable number.

855856834841 is a deficient number, since it is larger than the sum of its proper divisors (11807131).

855856834841 is a wasteful number, since it uses less digits than its factorization.

855856834841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11807130.

The product of its digits is 147456000, while the sum is 65.

The spelling of 855856834841 in words is "eight hundred fifty-five billion, eight hundred fifty-six million, eight hundred thirty-four thousand, eight hundred forty-one".