71661791088 has 60 divisors (see below), whose sum is σ = 200584561320. Its totient is φ = 23883562368.

The previous prime is 71661791039. The next prime is 71661791093. The reversal of 71661791088 is 88019716617.

71661791088 is a `hidden beast` number, since 7 + 1 + 6 + 617 + 9 + 10 + 8 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 988695 + ... + 1058697.

It is an arithmetic number, because the mean of its divisors is an integer number (3343076022).

Almost surely, 2^71661791088 is an apocalyptic number.

It is an amenable number.

71661791088 is an abundant number, since it is smaller than the sum of its proper divisors (128922770232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71661791088 is a wasteful number, since it uses less digits than its factorization.

71661791088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77126 (or 77117 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 71661791088 in words is "seventy-one billion, six hundred sixty-one million, seven hundred ninety-one thousand, eighty-eight".