181001453523841 has 2 divisors, whose sum is σ = 181001453523842. Its totient is φ = 181001453523840.

The previous prime is 181001453523829. The next prime is 181001453523857. The reversal of 181001453523841 is 148325354100181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92244422524816 + 88757030999025 = 9604396^2 + 9421095^2 .

It is a cyclic number.

It is not a de Polignac number, because 181001453523841 - 2⁵ = 181001453523809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181001453523791 and 181001453523800.

It is not a weakly prime, because it can be changed into another prime (181001453520841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90500726761920 + 90500726761921.

It is an arithmetic number, because the mean of its divisors is an integer number (90500726761921).

Almost surely, 2^{181001453523841} is an apocalyptic number.

It is an amenable number.

181001453523841 is a deficient number, since it is larger than the sum of its proper divisors (1).

181001453523841 is an equidigital number, since it uses as much as digits as its factorization.

181001453523841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 181001453523841 in words is "one hundred eighty-one trillion, one billion, four hundred fifty-three million, five hundred twenty-three thousand, eight hundred forty-one".