81703173682 has 8 divisors (see below), whose sum is σ = 131982049836. Its totient is φ = 37709157072.

The previous prime is 81703173667. The next prime is 81703173683. The reversal of 81703173682 is 28637130718.

It can be written as a sum of positive squares in 2 ways, for example, as 73089663201 + 8613510481 = 270351^2 + 92809^2 .

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

It is a super-2 number, since 2×81703173682² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81703173683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1571214853 + ... + 1571214904.

Almost surely, 2^81703173682 is an apocalyptic number.

81703173682 is a deficient number, since it is larger than the sum of its proper divisors (50278876154).

81703173682 is a wasteful number, since it uses less digits than its factorization.

81703173682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142429772.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 81703173682 in words is "eighty-one billion, seven hundred three million, one hundred seventy-three thousand, six hundred eighty-two".