81702168546 has 32 divisors (see below), whose sum is σ = 173100173760. Its totient is φ = 25636343616.

The previous prime is 81702168523. The next prime is 81702168571. The reversal of 81702168546 is 64586120718.

It is a junction number, because it is equal to n+sod(n) for n = 81702168495 and 81702168504.

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 15 ways as a sum of consecutive naturals, for example, 2264541 + ... + 2300336.

It is an arithmetic number, because the mean of its divisors is an integer number (5409380430).

Almost surely, 2^81702168546 is an apocalyptic number.

81702168546 is an abundant number, since it is smaller than the sum of its proper divisors (91398005214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81702168546 is a wasteful number, since it uses less digits than its factorization.

81702168546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4565058.

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 81702168546 in words is "eighty-one billion, seven hundred two million, one hundred sixty-eight thousand, five hundred forty-six".