71111115555556 has 12 divisors (see below), whose sum is σ = 124803081769968. Its totient is φ = 35453092192712.

The previous prime is 71111115555541. The next prime is 71111115555577. The reversal of 71111115555556 is 65555551111117.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25616394706 + ... + 25616397481.

It is an arithmetic number, because the mean of its divisors is an integer number (10400256814164).

Almost surely, 2^{71111115555556} is an apocalyptic number.

71111115555556 is the 5333334-th centered pentagonal number.

It is an amenable number.

71111115555556 is a deficient number, since it is larger than the sum of its proper divisors (53691966214412).

71111115555556 is a wasteful number, since it uses less digits than its factorization.

71111115555556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51232792538 (or 51232792536 counting only the distinct ones).

The product of its digits is 656250, while the sum is 49.

The spelling of 71111115555556 in words is "seventy-one trillion, one hundred eleven billion, one hundred fifteen million, five hundred fifty-five thousand, five hundred fifty-six".