871625485485 has 24 divisors (see below), whose sum is σ = 1535585013144. Its totient is φ = 457246154880.

The previous prime is 871625485463. The next prime is 871625485499. The reversal of 871625485485 is 584584526178.

871625485485 is a `hidden beast` number, since 8 + 7 + 1 + 6 + 2 + 548 + 5 + 4 + 85 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5322249 + 871620163236 = 2307^2 + 933606^2 .

It is not a de Polignac number, because 871625485485 - 2¹⁰ = 871625484461 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158763282 + ... + 158768771.

It is an arithmetic number, because the mean of its divisors is an integer number (63982708881).

Almost surely, 2^871625485485 is an apocalyptic number.

It is an amenable number.

871625485485 is a deficient number, since it is larger than the sum of its proper divisors (663959527659).

871625485485 is a wasteful number, since it uses less digits than its factorization.

871625485485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317532125 (or 317532122 counting only the distinct ones).

The product of its digits is 86016000, while the sum is 63.

The spelling of 871625485485 in words is "eight hundred seventy-one billion, six hundred twenty-five million, four hundred eighty-five thousand, four hundred eighty-five".