81708116674 has 8 divisors (see below), whose sum is σ = 122828037948. Its totient is φ = 40765437360.

The previous prime is 81708116663. The next prime is 81708116681. The reversal of 81708116674 is 47661180718.

It can be written as a sum of positive squares in 2 ways, for example, as 80659976049 + 1048140625 = 284007^2 + 32375^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44309337 + ... + 44311180.

Almost surely, 2^81708116674 is an apocalyptic number.

81708116674 is a deficient number, since it is larger than the sum of its proper divisors (41119921274).

81708116674 is a wasteful number, since it uses less digits than its factorization.

81708116674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88620980.

The product of its (nonzero) digits is 451584, while the sum is 49.

The spelling of 81708116674 in words is "eighty-one billion, seven hundred eight million, one hundred sixteen thousand, six hundred seventy-four".