71821628582 has 16 divisors (see below), whose sum is σ = 117572608512. Its totient is φ = 32633331720.

The previous prime is 71821628573. The next prime is 71821628629. The reversal of 71821628582 is 28582612817.

It is a self number, because there is not a number n which added to its sum of digits gives 71821628582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585938 + ... + 697829.

It is an arithmetic number, because the mean of its divisors is an integer number (7348288032).

Almost surely, 2^71821628582 is an apocalyptic number.

71821628582 is a deficient number, since it is larger than the sum of its proper divisors (45750979930).

71821628582 is a wasteful number, since it uses less digits than its factorization.

71821628582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286323.

The product of its digits is 860160, while the sum is 50.

The spelling of 71821628582 in words is "seventy-one billion, eight hundred twenty-one million, six hundred twenty-eight thousand, five hundred eighty-two".