71961631732 has 24 divisors (see below), whose sum is σ = 126295676360. Its totient is φ = 35877219840.

The previous prime is 71961631673. The next prime is 71961631747. The reversal of 71961631732 is 23713616917.

It can be written as a sum of positive squares in 4 ways, for example, as 3629580516 + 68332051216 = 60246^2 + 261404^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5597632 + ... + 5610472.

Almost surely, 2^71961631732 is an apocalyptic number.

It is an amenable number.

71961631732 is a deficient number, since it is larger than the sum of its proper divisors (54334044628).

71961631732 is a wasteful number, since it uses less digits than its factorization.

71961631732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16771 (or 16769 counting only the distinct ones).

The product of its digits is 285768, while the sum is 46.

The spelling of 71961631732 in words is "seventy-one billion, nine hundred sixty-one million, six hundred thirty-one thousand, seven hundred thirty-two".