81028284226 has 8 divisors (see below), whose sum is σ = 121573787580. Its totient is φ = 40503688368.

The previous prime is 81028284187. The next prime is 81028284247. The reversal of 81028284226 is 62248282018.

It can be written as a sum of positive squares in 2 ways, for example, as 69255817225 + 11772467001 = 263165^2 + 108501^2 .

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

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, 5217181 + ... + 5232688.

Almost surely, 2^81028284226 is an apocalyptic number.

81028284226 is a deficient number, since it is larger than the sum of its proper divisors (40545503354).

81028284226 is a wasteful number, since it uses less digits than its factorization.

81028284226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10453748.

The product of its (nonzero) digits is 196608, while the sum is 43.

The spelling of 81028284226 in words is "eighty-one billion, twenty-eight million, two hundred eighty-four thousand, two hundred twenty-six".