181228266879 has 32 divisors (see below), whose sum is σ = 286654484736. Its totient is φ = 100580497920.

The previous prime is 181228266839. The next prime is 181228266887. The reversal of 181228266879 is 978662822181.

It is not a de Polignac number, because 181228266879 - 2⁸ = 181228266623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181228266839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4344717 + ... + 4386230.

It is an arithmetic number, because the mean of its divisors is an integer number (8957952648).

Almost surely, 2^181228266879 is an apocalyptic number.

181228266879 is a deficient number, since it is larger than the sum of its proper divisors (105426217857).

181228266879 is a wasteful number, since it uses less digits than its factorization.

181228266879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731015.

The product of its digits is 9289728, while the sum is 60.

The spelling of 181228266879 in words is "one hundred eighty-one billion, two hundred twenty-eight million, two hundred sixty-six thousand, eight hundred seventy-nine".