871745173081 has 16 divisors (see below), whose sum is σ = 958259917440. Its totient is φ = 789349017600.

The previous prime is 871745173063. The next prime is 871745173087. The reversal of 871745173081 is 180371547178.

It is a cyclic number.

It is not a de Polignac number, because 871745173081 - 2⁹ = 871745172569 is a prime.

It is a super-2 number, since 2×871745173081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871745173087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198120 + ... + 1335193.

It is an arithmetic number, because the mean of its divisors is an integer number (59891244840).

Almost surely, 2^871745173081 is an apocalyptic number.

It is an amenable number.

871745173081 is a deficient number, since it is larger than the sum of its proper divisors (86514744359).

871745173081 is a wasteful number, since it uses less digits than its factorization.

871745173081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534656.

The product of its (nonzero) digits is 1317120, while the sum is 52.

The spelling of 871745173081 in words is "eight hundred seventy-one billion, seven hundred forty-five million, one hundred seventy-three thousand, eighty-one".