871539477771 has 16 divisors (see below), whose sum is σ = 1178959044608. Its totient is φ = 572633712000.

The previous prime is 871539477737. The next prime is 871539477791. The reversal of 871539477771 is 177774935178.

It is not a de Polignac number, because 871539477771 - 2⁶ = 871539477707 is a prime.

It is a super-2 number, since 2×871539477771² (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 (871539477701) 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, 7516990 + ... + 7632051.

It is an arithmetic number, because the mean of its divisors is an integer number (73684940288).

Almost surely, 2^871539477771 is an apocalyptic number.

871539477771 is a deficient number, since it is larger than the sum of its proper divisors (307419566837).

871539477771 is a wasteful number, since it uses less digits than its factorization.

871539477771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15149322.

The product of its digits is 72606240, while the sum is 66.

The spelling of 871539477771 in words is "eight hundred seventy-one billion, five hundred thirty-nine million, four hundred seventy-seven thousand, seven hundred seventy-one".