71347665556 has 12 divisors (see below), whose sum is σ = 124862179540. Its totient is φ = 35672757120.

The previous prime is 71347665533. The next prime is 71347665611. The reversal of 71347665556 is 65556674317.

It can be written as a sum of positive squares in 2 ways, for example, as 36016448400 + 35331217156 = 189780^2 + 187966^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71347665497 and 71347665506.

It is a congruent number.

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, 109125 + ... + 393196.

Almost surely, 2^71347665556 is an apocalyptic number.

It is an amenable number.

71347665556 is a deficient number, since it is larger than the sum of its proper divisors (53514513984).

71347665556 is a wasteful number, since it uses less digits than its factorization.

71347665556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537834 (or 537832 counting only the distinct ones).

The product of its digits is 15876000, while the sum is 55.

The spelling of 71347665556 in words is "seventy-one billion, three hundred forty-seven million, six hundred sixty-five thousand, five hundred fifty-six".