8281651681806 has 32 divisors (see below), whose sum is σ = 16892347899168. Its totient is φ = 2705811838080.

The previous prime is 8281651681783. The next prime is 8281651681837. The reversal of 8281651681806 is 6081861561828.

It is a self number, because there is not a number n which added to its sum of digits gives 8281651681806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12428961 + ... + 13078316.

It is an arithmetic number, because the mean of its divisors is an integer number (527885871849).

Almost surely, 2^{8281651681806} is an apocalyptic number.

8281651681806 is an abundant number, since it is smaller than the sum of its proper divisors (8610696217362).

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

8281651681806 is a wasteful number, since it uses less digits than its factorization.

8281651681806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25508356.

The product of its (nonzero) digits is 8847360, while the sum is 60.

The spelling of 8281651681806 in words is "eight trillion, two hundred eighty-one billion, six hundred fifty-one million, six hundred eighty-one thousand, eight hundred six".