871374421872225 has 18 divisors (see below), whose sum is σ = 1560728408953766. Its totient is φ = 464733024998400.

The previous prime is 871374421872223. The next prime is 871374421872239. The reversal of 871374421872225 is 522278124473178.

871374421872225 is a `hidden beast` number, since 8 + 7 + 1 + 3 + 7 + 442 + 187 + 2 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 253405932975441 + 617968488896784 = 15918729^2 + 24858972^2 .

It is not a de Polignac number, because 871374421872225 - 2¹ = 871374421872223 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (871374421872223) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1936387603936 + ... + 1936387604385.

Almost surely, 2^{871374421872225} is an apocalyptic number.

It is an amenable number.

871374421872225 is a deficient number, since it is larger than the sum of its proper divisors (689353987081541).

871374421872225 is a wasteful number, since it uses less digits than its factorization.

871374421872225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3872775208337 (or 3872775208329 counting only the distinct ones).

The product of its digits is 84295680, while the sum is 63.

The spelling of 871374421872225 in words is "eight hundred seventy-one trillion, three hundred seventy-four billion, four hundred twenty-one million, eight hundred seventy-two thousand, two hundred twenty-five".