855553871 has 4 divisors (see below), whose sum is σ = 864374112. Its totient is φ = 846733632.

The previous prime is 855553819. The next prime is 855553873. The reversal of 855553871 is 178355558.

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

It is a cyclic number.

It is not a de Polignac number, because 855553871 - 2¹⁸ = 855291727 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 (855553873) 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, 4409975 + ... + 4410168.

It is an arithmetic number, because the mean of its divisors is an integer number (216093528).

Almost surely, 2^855553871 is an apocalyptic number.

855553871 is a deficient number, since it is larger than the sum of its proper divisors (8820241).

855553871 is an equidigital number, since it uses as much as digits as its factorization.

855553871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820240.

The product of its digits is 840000, while the sum is 47.

The square root of 855553871 is about 29249.8524953546. The cubic root of 855553871 is about 949.3268993800.

It can be divided in two parts, 8555 and 53871, that added together give a palindrome (62426).

The spelling of 855553871 in words is "eight hundred fifty-five million, five hundred fifty-three thousand, eight hundred seventy-one".