71821500536 has 16 divisors (see below), whose sum is σ = 134907090840. Its totient is φ = 35846276320.

The previous prime is 71821500523. The next prime is 71821500593. The reversal of 71821500536 is 63500512817.

It is a self number, because there is not a number n which added to its sum of digits gives 71821500536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8054510 + ... + 8063421.

Almost surely, 2^71821500536 is an apocalyptic number.

It is an amenable number.

71821500536 is a deficient number, since it is larger than the sum of its proper divisors (63085590304).

71821500536 is a wasteful number, since it uses less digits than its factorization.

71821500536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16118494 (or 16118490 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 71821500536 in words is "seventy-one billion, eight hundred twenty-one million, five hundred thousand, five hundred thirty-six".