81713761012 has 24 divisors (see below), whose sum is σ = 154086732800. Its totient is φ = 37692560736.

The previous prime is 81713760967. The next prime is 81713761043. The reversal of 81713761012 is 21016731718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355212 + ... + 538147.

Almost surely, 2^81713761012 is an apocalyptic number.

It is an amenable number.

81713761012 is a deficient number, since it is larger than the sum of its proper divisors (72372971788).

81713761012 is a wasteful number, since it uses less digits than its factorization.

81713761012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895135 (or 895133 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 37.

The spelling of 81713761012 in words is "eighty-one billion, seven hundred thirteen million, seven hundred sixty-one thousand, twelve".