871140355801 has 3 divisors (see below), whose sum is σ = 871141289151. Its totient is φ = 871139422452.

The previous prime is 871140355783. The next prime is 871140355807. The reversal of 871140355801 is 108553041178.

The square root of 871140355801 is 933349.

It is a perfect power (a square), and thus also a powerful number.

871140355801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 714276832201 + 156863523600 = 845149^2 + 396060^2 .

It is not a de Polignac number, because 871140355801 - 2⁹ = 871140355289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871140355807) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 466675 + ... + 1400023.

It is an arithmetic number, because the mean of its divisors is an integer number (290380429717).

Almost surely, 2^871140355801 is an apocalyptic number.

871140355801 is the 933349-th square number.

871140355801 is the 466675-th centered octagonal number.

It is an amenable number.

871140355801 is a deficient number, since it is larger than the sum of its proper divisors (933350).

871140355801 is an frugal number, since it uses more digits than its factorization.

871140355801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866698 (or 933349 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 43.

Adding to 871140355801 its reverse (108553041178), we get a palindrome (979693396979).

The spelling of 871140355801 in words is "eight hundred seventy-one billion, one hundred forty million, three hundred fifty-five thousand, eight hundred one".