71643307532 has 24 divisors (see below), whose sum is σ = 127530547200. Its totient is φ = 35206291856.

The previous prime is 71643307493. The next prime is 71643307583. The reversal of 71643307532 is 23570334617.

It is a self number, because there is not a number n which added to its sum of digits gives 71643307532.

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, 1048469 + ... + 1114707.

It is an arithmetic number, because the mean of its divisors is an integer number (5313772800).

Almost surely, 2^71643307532 is an apocalyptic number.

It is an amenable number.

71643307532 is a deficient number, since it is larger than the sum of its proper divisors (55887239668).

71643307532 is a wasteful number, since it uses less digits than its factorization.

71643307532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70885 (or 70883 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 41.

The spelling of 71643307532 in words is "seventy-one billion, six hundred forty-three million, three hundred seven thousand, five hundred thirty-two".