181626381082 has 16 divisors (see below), whose sum is σ = 281867083560. Its totient is φ = 87671420928.

The previous prime is 181626381067. The next prime is 181626381109. The reversal of 181626381082 is 280183626181.

It can be written as a sum of positive squares in 4 ways, for example, as 93256333641 + 88370047441 = 305379^2 + 297271^2 .

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 7 ways as a sum of consecutive naturals, for example, 327538 + ... + 685954.

Almost surely, 2^181626381082 is an apocalyptic number.

181626381082 is a deficient number, since it is larger than the sum of its proper divisors (100240702478).

181626381082 is a wasteful number, since it uses less digits than its factorization.

181626381082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367185.

The product of its (nonzero) digits is 221184, while the sum is 46.

The spelling of 181626381082 in words is "one hundred eighty-one billion, six hundred twenty-six million, three hundred eighty-one thousand, eighty-two".