81000088000018 has 16 divisors (see below), whose sum is σ = 132545878549056. Its totient is φ = 36818144039440.

The previous prime is 81000087999997. The next prime is 81000088000019.

81000088000018 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×81000088000018² (a number of 29 digits) contains 22 as substring.

81000088000018 is a strobogrammatic number because it is the same when read upside-down.

It is not an unprimeable number, because it can be changed into a prime (81000088000019) by changing a digit.

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, 7503555 + ... + 14775097.

It is an arithmetic number, because the mean of its divisors is an integer number (8284117409316).

Almost surely, 2^{81000088000018} is an apocalyptic number.

81000088000018 is a deficient number, since it is larger than the sum of its proper divisors (51545790549038).

81000088000018 is a wasteful number, since it uses less digits than its factorization.

81000088000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7777889.

The product of its (nonzero) digits is 4096, while the sum is 34.

The spelling of 81000088000018 in words is "eighty-one trillion, eighty-eight million, eighteen", and thus it is an aban number and an uban number.