71886159709648 has 40 divisors (see below), whose sum is σ = 142679406824136. Its totient is φ = 35065703424000.

The previous prime is 71886159709589. The next prime is 71886159709681. The reversal of 71886159709648 is 84690795168817.

It can be written as a sum of positive squares in 4 ways, for example, as 2873730163264 + 69012429546384 = 1695208^2 + 8307372^2 .

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, 31772640 + ... + 33959872.

Almost surely, 2^{71886159709648} is an apocalyptic number.

It is an amenable number.

71886159709648 is a deficient number, since it is larger than the sum of its proper divisors (70793247114488).

71886159709648 is a wasteful number, since it uses less digits than its factorization.

71886159709648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237383 (or 2237377 counting only the distinct ones).

The product of its (nonzero) digits is 1463132160, while the sum is 79.

The spelling of 71886159709648 in words is "seventy-one trillion, eight hundred eighty-six billion, one hundred fifty-nine million, seven hundred nine thousand, six hundred forty-eight".