81133155133118 has 16 divisors (see below), whose sum is σ = 132779365737984. Its totient is φ = 36874256607960.

The previous prime is 81133155133087. The next prime is 81133155133157.

81133155133118 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222327080 + ... + 222691707.

It is an arithmetic number, because the mean of its divisors is an integer number (8298710358624).

Almost surely, 2^{81133155133118} is an apocalyptic number.

81133155133118 is a deficient number, since it is larger than the sum of its proper divisors (51646210604866).

81133155133118 is a wasteful number, since it uses less digits than its factorization.

81133155133118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445027087.

The product of its digits is 129600, while the sum is 44.

The spelling of 81133155133118 in words is "eighty-one trillion, one hundred thirty-three billion, one hundred fifty-five million, one hundred thirty-three thousand, one hundred eighteen".