181638060677018 has 16 divisors (see below), whose sum is σ = 297233200499040. Its totient is φ = 82560731790000.

The previous prime is 181638060676991. The next prime is 181638060677063. The reversal of 181638060677018 is 810776060836181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100234733 + ... + 102030768.

It is an arithmetic number, because the mean of its divisors is an integer number (18577075031190).

Almost surely, 2^{181638060677018} is an apocalyptic number.

181638060677018 is a deficient number, since it is larger than the sum of its proper divisors (115595139822022).

181638060677018 is a wasteful number, since it uses less digits than its factorization.

181638060677018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202306333.

The product of its (nonzero) digits is 16257024, while the sum is 62.

The spelling of 181638060677018 in words is "one hundred eighty-one trillion, six hundred thirty-eight billion, sixty million, six hundred seventy-seven thousand, eighteen".