871815481725 has 24 divisors (see below), whose sum is σ = 1441892400480. Its totient is φ = 464809933120.

The previous prime is 871815481721. The next prime is 871815481729. The reversal of 871815481725 is 527184518178.

871815481725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (871815481721) and next prime (871815481729).

It is not a de Polignac number, because 871815481725 - 2² = 871815481721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871815481721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1757154 + ... + 2198003.

It is an arithmetic number, because the mean of its divisors is an integer number (60078850020).

Almost surely, 2^871815481725 is an apocalyptic number.

It is an amenable number.

871815481725 is a deficient number, since it is larger than the sum of its proper divisors (570076918755).

871815481725 is a wasteful number, since it uses less digits than its factorization.

871815481725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958109 (or 3958104 counting only the distinct ones).

The product of its digits is 5017600, while the sum is 57.

The spelling of 871815481725 in words is "eight hundred seventy-one billion, eight hundred fifteen million, four hundred eighty-one thousand, seven hundred twenty-five".