1871870855 has 4 divisors (see below), whose sum is σ = 2246245032. Its totient is φ = 1497496680.

The previous prime is 1871870839. The next prime is 1871870879. The reversal of 1871870855 is 5580781781.

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

It is not a de Polignac number, because 1871870855 - 2⁴ = 1871870839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187187081 + ... + 187187090.

It is an arithmetic number, because the mean of its divisors is an integer number (561561258).

Almost surely, 2^1871870855 is an apocalyptic number.

1871870855 is a deficient number, since it is larger than the sum of its proper divisors (374374177).

1871870855 is an equidigital number, since it uses as much as digits as its factorization.

1871870855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374374176.

The product of its (nonzero) digits is 627200, while the sum is 50.

The square root of 1871870855 is about 43265.1228473929. The cubic root of 1871870855 is about 1232.4196876408.

The spelling of 1871870855 in words is "one billion, eight hundred seventy-one million, eight hundred seventy thousand, eight hundred fifty-five".