181606574602841 has 2 divisors, whose sum is σ = 181606574602842. Its totient is φ = 181606574602840.

The previous prime is 181606574602801. The next prime is 181606574602919. The reversal of 181606574602841 is 148206475606181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155501423740441 + 26105150862400 = 12470021^2 + 5109320^2 .

It is a cyclic number.

It is not a de Polignac number, because 181606574602841 - 2¹⁴ = 181606574586457 is a prime.

It is not a weakly prime, because it can be changed into another prime (181606574602801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90803287301420 + 90803287301421.

It is an arithmetic number, because the mean of its divisors is an integer number (90803287301421).

Almost surely, 2^{181606574602841} is an apocalyptic number.

It is an amenable number.

181606574602841 is a deficient number, since it is larger than the sum of its proper divisors (1).

181606574602841 is an equidigital number, since it uses as much as digits as its factorization.

181606574602841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15482880, while the sum is 59.

The spelling of 181606574602841 in words is "one hundred eighty-one trillion, six hundred six billion, five hundred seventy-four million, six hundred two thousand, eight hundred forty-one".