71531587832 has 16 divisors (see below), whose sum is σ = 134135772000. Its totient is φ = 35762048640.

The previous prime is 71531587817. The next prime is 71531587849. The reversal of 71531587832 is 23878513517.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386144 + ... + 540527.

It is an arithmetic number, because the mean of its divisors is an integer number (8383485750).

Almost surely, 2^71531587832 is an apocalyptic number.

It is an amenable number.

71531587832 is a deficient number, since it is larger than the sum of its proper divisors (62604184168).

71531587832 is a wasteful number, since it uses less digits than its factorization.

71531587832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936326 (or 936322 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 50.

The spelling of 71531587832 in words is "seventy-one billion, five hundred thirty-one million, five hundred eighty-seven thousand, eight hundred thirty-two".