81103000068 has 18 divisors (see below), whose sum is σ = 205010361374. Its totient is φ = 27034333344.

The previous prime is 81103000061. The next prime is 81103000081. The reversal of 81103000068 is 86000030118.

It can be written as a sum of positive squares in only one way, i.e., 75340368324 + 5762631744 = 274482^2 + 75912^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (81103000061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1126430521 + ... + 1126430592.

Almost surely, 2^81103000068 is an apocalyptic number.

It is an amenable number.

81103000068 is an abundant number, since it is smaller than the sum of its proper divisors (123907361306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81103000068 is a wasteful number, since it uses less digits than its factorization.

81103000068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252861123 (or 2252861118 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 81103000068 in words is "eighty-one billion, one hundred three million, sixty-eight", and thus it is an aban number.