71821684082 has 24 divisors (see below), whose sum is σ = 114475967616. Its totient is φ = 33788559168.

The previous prime is 71821684049. The next prime is 71821684087. The reversal of 71821684082 is 28048612817.

It is a super-2 number, since 2×71821684082² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (71821684087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2193443 + ... + 2225945.

It is an arithmetic number, because the mean of its divisors is an integer number (4769831984).

Almost surely, 2^71821684082 is an apocalyptic number.

71821684082 is a deficient number, since it is larger than the sum of its proper divisors (42654283534).

71821684082 is a wasteful number, since it uses less digits than its factorization.

71821684082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36362 (or 36345 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 47.

The spelling of 71821684082 in words is "seventy-one billion, eight hundred twenty-one million, six hundred eighty-four thousand, eighty-two".