871837563725 has 24 divisors (see below), whose sum is σ = 1099628780712. Its totient is φ = 685567411200.

The previous prime is 871837563721. The next prime is 871837563757. The reversal of 871837563725 is 527365738178.

It can be written as a sum of positive squares in 12 ways, for example, as 88943518756 + 782894044969 = 298234^2 + 884813^2 .

It is not a de Polignac number, because 871837563725 - 2² = 871837563721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871837563721) 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, 280496 + ... + 1349945.

It is an arithmetic number, because the mean of its divisors is an integer number (45817865863).

Almost surely, 2^871837563725 is an apocalyptic number.

It is an amenable number.

871837563725 is a deficient number, since it is larger than the sum of its proper divisors (227791216987).

871837563725 is a wasteful number, since it uses less digits than its factorization.

871837563725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630817 (or 1630812 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 62.

The spelling of 871837563725 in words is "eight hundred seventy-one billion, eight hundred thirty-seven million, five hundred sixty-three thousand, seven hundred twenty-five".