871724242251 has 18 divisors (see below), whose sum is σ = 1337582261132. Its totient is φ = 546964228800.

The previous prime is 871724242163. The next prime is 871724242267. The reversal of 871724242251 is 152242427178.

871724242251 is a `hidden beast` number, since 8 + 7 + 172 + 4 + 2 + 422 + 51 = 666.

It is not a de Polignac number, because 871724242251 - 2²⁷ = 871590024523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 871724242197 and 871724242206.

It is not an unprimeable number, because it can be changed into a prime (871724242351) 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, 167572225 + ... + 167577426.

Almost surely, 2^871724242251 is an apocalyptic number.

871724242251 is a deficient number, since it is larger than the sum of its proper divisors (465858018881).

871724242251 is a wasteful number, since it uses less digits than its factorization.

871724242251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335149691 (or 335149671 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The spelling of 871724242251 in words is "eight hundred seventy-one billion, seven hundred twenty-four million, two hundred forty-two thousand, two hundred fifty-one".