71535566812 has 6 divisors (see below), whose sum is σ = 125187241928. Its totient is φ = 35767783404.

The previous prime is 71535566803. The next prime is 71535566849. The reversal of 71535566812 is 21866553517.

It is a super-2 number, since 2×71535566812² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8941945848 + ... + 8941945855.

Almost surely, 2^71535566812 is an apocalyptic number.

It is an amenable number.

71535566812 is a deficient number, since it is larger than the sum of its proper divisors (53651675116).

71535566812 is a wasteful number, since it uses less digits than its factorization.

71535566812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17883891707 (or 17883891705 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 49.

The spelling of 71535566812 in words is "seventy-one billion, five hundred thirty-five million, five hundred sixty-six thousand, eight hundred twelve".