71191983122 has 54 divisors (see below), whose sum is σ = 121072358421. Its totient is φ = 31379428080.

The previous prime is 71191983089. The next prime is 71191983157. The reversal of 71191983122 is 22138919117.

It can be written as a sum of positive squares in 2 ways, for example, as 60871251841 + 10320731281 = 246721^2 + 101591^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=188669.

It is a Duffinian 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 26 ways as a sum of consecutive naturals, for example, 112823747 + ... + 112824377.

Almost surely, 2^71191983122 is an apocalyptic number.

71191983122 is a deficient number, since it is larger than the sum of its proper divisors (49880375299).

71191983122 is an equidigital number, since it uses as much as digits as its factorization.

71191983122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336 (or 669 counting only the distinct ones).

The product of its digits is 54432, while the sum is 44.

The spelling of 71191983122 in words is "seventy-one billion, one hundred ninety-one million, nine hundred eighty-three thousand, one hundred twenty-two".