81223080186 has 8 divisors (see below), whose sum is σ = 162446160384. Its totient is φ = 27074360060.

The previous prime is 81223080167. The next prime is 81223080269. The reversal of 81223080186 is 68108032218.

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

81223080186 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6768590010 + ... + 6768590021.

It is an arithmetic number, because the mean of its divisors is an integer number (20305770048).

Almost surely, 2^81223080186 is an apocalyptic number.

81223080186 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81223080186 is a wasteful number, since it uses less digits than its factorization.

81223080186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13537180036.

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 81223080186 in words is "eighty-one billion, two hundred twenty-three million, eighty thousand, one hundred eighty-six".