81068811084 has 72 divisors (see below), whose sum is σ = 209762192640. Its totient is φ = 26385361632.

The previous prime is 81068811079. The next prime is 81068811121. The reversal of 81068811084 is 48011886018.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5576377 + ... + 5590895.

Almost surely, 2^81068811084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81068811084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104881096320).

81068811084 is an abundant number, since it is smaller than the sum of its proper divisors (128693381556).

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

81068811084 is a wasteful number, since it uses less digits than its factorization.

81068811084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18179 (or 18174 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 45.

The spelling of 81068811084 in words is "eighty-one billion, sixty-eight million, eight hundred eleven thousand, eighty-four".